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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-103858",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-01T15:00:37.761849Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-01T15:00:57.587Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:misp:misp:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "PostsController (discussion/thread posting)"
          ],
          "product": "MISP",
          "programFiles": [
            "app/Controller/PostsController.php"
          ],
          "repo": "https://github.com/MISP/MISP",
          "vendor": "MISP",
          "versions": [
            {
              "lessThan": "2.5.48",
              "status": "affected",
              "version": "unspecified",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Bastien Bossiroy and C\u00e9lien Desteucq of NCIA"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "iglocska"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Claude Opus 5.5 (1M context)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eMISP contains an incomplete authorization check in the discussion posting functionality. When a user submits a post to a thread or replies to an existing post, the application only verified whether the target thread was restricted to a single organization (org-only distribution). It did not enforce the full thread access control list, including sharing-group membership and event-level visibility.\u003c/p\u003e\u003cp\u003eAs a result, an authenticated user who is outside the relevant sharing group or who does not have visibility on the associated event could:\u003c/p\u003e\u003cp\u003e- Read the thread title and the content of the quoted post\u003c/p\u003e\u003cp\u003e- Submit a new post into the discussion thread\u003c/p\u003e\u003cp\u003eThis constitutes both an information disclosure (reading restricted thread and post content) and an integrity issue (injecting content into a thread the user is not authorized to participate in).\u003c/p\u003e\u003cp\u003eAffected: \u0026lt;2.5.48\u003c/p\u003e"
            }
          ],
          "value": "MISP contains an incomplete authorization check in the discussion posting functionality. When a user submits a post to a thread or replies to an existing post, the application only verified whether the target thread was restricted to a single organization (org-only distribution). It did not enforce the full thread access control list, including sharing-group membership and event-level visibility.\n\nAs a result, an authenticated user who is outside the relevant sharing group or who does not have visibility on the associated event could:\n\n- Read the thread title and the content of the quoted post\n\n- Submit a new post into the discussion thread\n\nThis constitutes both an information disclosure (reading restricted thread and post content) and an integrity issue (injecting content into a thread the user is not authorized to participate in).\n\nAffected: \u003c2.5.48"
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-10",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-10 Parameter Tampering"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
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            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "LOW",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
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              "lang": "en",
              "value": "GENERAL"
            }
          ]
        },
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          "format": "SSVC",
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            "content": {
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              "role": "Supplier",
              "timestamp": "2026-10-01T11:16:47Z",
              "version": "2.0.3"
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      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-285",
              "description": "CWE-285 Improper Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-01T11:31:32.840Z",
        "orgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
        "shortName": "CIRCL"
      },
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          "name": "Security patch",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/MISP/MISP/commit/79fbd4c75"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
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              "value": "\u003cp\u003eThe fix replaces the limited org-only distribution check with a call to the thread\u0027s full authorization method (checkIfAuthorised), which enforces the complete access control list including sharing groups and event-level visibility. The thread is only read after successful authorization, preventing disclosure of the title and content to unauthorized users. An additional null-check on the post\u0027s thread_id was added to prevent referencing posts without a valid thread association.\u003c/p\u003e"
            }
          ],
          "value": "The fix replaces the limited org-only distribution check with a call to the thread\u0027s full authorization method (checkIfAuthorised), which enforces the complete access control list including sharing groups and event-level visibility. The thread is only read after successful authorization, preventing disclosure of the title and content to unauthorized users. An additional null-check on the post\u0027s thread_id was added to prevent referencing posts without a valid thread association."
        }
      ],
      "title": "MISP Incomplete Thread Authorization Allows Unauthorized Read and Post Access to Discussions",
      "x_gcve": [
        {
          "extensions": {
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              "ai_annotations": [
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                  "ai_level": "generated",
                  "description": "Draft vulnerability metadata was generated from a git-format patch using an Ollama-hosted language model. Human validation is required before publication.",
                  "gna_source": 1,
                  "models": [
                    {
                      "gna_source": 1,
                      "identifier": "qwen3.8:27b",
                      "name": "qwen3.8:27b",
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                    }
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                  "review_status": "full",
                  "scope": "record",
                  "tags": [
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              ]
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            "bcp-05-x-02": {
              "x_patch2vuln": {
                "assumptions": [
                  "The exact affected version range is uncertain; the tag boundary v2.5.48 with 42 commits after the fix suggests the fix landed around or before v2.5.48, but the precise first-affected and first-fixed versions are not stated in the patch.",
                  "The checkIfAuthorised() method is assumed to enforce the full thread ACL including sharing groups and event visibility, based on the commit message description; the method\u0027s implementation is not included in the patch.",
                  "CAPEC-10 (Parameter Tampering) is the closest available CAPEC mapping; no CAPEC specifically covers \u0027incomplete authorization check on a direct object reference\u0027 was identified in the catalog.",
                  "The CVSS assumes the attacker already possesses a valid MISP account (PR:L); unauthenticated access is not indicated by the patch.",
                  "The AI co-author (Claude Opus 5.5) is credited as a tool rather than a person, per the Co-Authored-By line."
                ],
                "capecRationale": [
                  {
                    "capecId": "CAPEC-10",
                    "rationale": "The attacker manipulates the target_id parameter (thread_id or post_id) in the posts/add request to reference a thread or post they do not have full access to. The incomplete server-side authorization check then permits the operation. CAPEC-10 is the closest available pattern for exploiting a server\u0027s failure to properly validate the authorization context of a user-supplied resource identifier. Uncertainty: no CAPEC specifically named \u0027Insecure Direct Object Reference\u0027 or \u0027Broken Access Control via Incomplete ACL\u0027 exists in the CAPEC catalog, so Parameter Tampering is the best available match."
                  }
                ],
                "commit": "79fbd4c7580adc0518581351c3d8c3d5b3ac7c97",
                "confidence": "medium",
                "credits": [
                  {
                    "lang": "en",
                    "type": "reporter",
                    "value": "Bastien Bossiroy and C\u00e9lien Desteucq of NCIA"
                  },
                  {
                    "lang": "en",
                    "type": "remediation developer",
                    "value": "iglocska"
                  },
                  {
                    "lang": "en",
                    "type": "remediation developer",
                    "value": "Claude Opus 5.5 (1M context)"
                  }
                ],
                "cvssRationale": "AV:N: web application accessible over network. AC:L: attacker only needs a valid thread_id or post_id, no race conditions or special timing. AT:N: no special attack prerequisites beyond authentication. PR:L: requires an authenticated MISP user account. UI:N: no victim interaction needed; the attacker directly issues the request. VC:L: attacker can read thread titles and quoted post content they should not see. VI:L: attacker can inject posts into unauthorized threads. VA:N: no availability impact. SC/SI/SA:N: no impact on subsequent components. The impact is bounded to the MISP instance\u0027s data and does not compromise the server or other systems.",
                "fixSummary": "The fix replaces the limited org-only distribution check with a call to the thread\u0027s full authorization method (checkIfAuthorised), which enforces the complete access control list including sharing groups and event-level visibility. The thread is only read after successful authorization, preventing disclosure of the title and content to unauthorized users. An additional null-check on the post\u0027s thread_id was added to prevent referencing posts without a valid thread association.",
                "generatedAt": "2026-10-01T11:16:47.016611Z",
                "generator": "patch2vuln.py",
                "model": "qwen3.8:27b",
                "modelComparison": {
                  "rankings": [
                    {
                      "agreementScore": 11,
                      "assumptionCount": 5,
                      "confidence": "medium",
                      "model": "qwen3.8:27b",
                      "score": 7
                    }
                  ],
                  "selectedModel": "qwen3.8:27b",
                  "selectionMethod": "deterministic-consensus-v1",
                  "selectionNotice": "The selected result is closest to model consensus; this heuristic does not establish factual correctness and human review remains required."
                },
                "patchSha256": "04551eba9b017a1a2ccf05a79c21466f3fd7095a42750bd2704d57b2e3730938",
                "patchSummary": "In PostsController.php add() method: (1) For the \u0027thread\u0027 target case, replaced the inline distribution==0 and org_id comparison with a call to Thread-\u003echeckIfAuthorised() before reading the thread; removed the separate _isSiteAdmin() bypass. (2) For the \u0027post\u0027 target case, added a check that the post has a non-empty thread_id, replaced the same limited distribution/org check with Thread-\u003echeckIfAuthorised(), and reordered the thread read to occur after the authorization check. Net: 8 insertions, 12 deletions in one file.",
                "patchTruncated": false,
                "patches": [
                  {
                    "commit": "79fbd4c7580adc0518581351c3d8c3d5b3ac7c97",
                    "date": "Wed, 23 Sep 2026 15:27:08 +0200",
                    "patchSha256": "04551eba9b017a1a2ccf05a79c21466f3fd7095a42750bd2704d57b2e3730938",
                    "source": "https://github.com/MISP/MISP/commit/79fbd4c75.patch",
                    "sourceUrl": "https://github.com/MISP/MISP/commit/79fbd4c75.patch",
                    "subject": "fix: [security] Apply the thread ACL when posting to a"
                  }
                ],
                "source": "https://github.com/MISP/MISP/commit/79fbd4c75.patch",
                "ssvc": {
                  "options": [
                    {
                      "Exploitation": "none"
                    },
                    {
                      "Automatable": "yes"
                    },
                    {
                      "Technical Impact": "partial"
                    }
                  ],
                  "role": "Supplier",
                  "timestamp": "2026-10-01T11:16:47Z",
                  "version": "2.0.3"
                },
                "subject": "fix: [security] Apply the thread ACL when posting to a",
                "tagVersionBoundary": {
                  "commits_after_fix": 42,
                  "repository": "https://github.com/MISP/MISP",
                  "tag": "v2.5.48",
                  "version": "2.5.48",
                  "version_type": "semver"
                },
                "weaknessRationale": [
                  {
                    "cweId": "CWE-285",
                    "rationale": "The authorization check was present but incomplete: it only verified org-level distribution (distribution==0) and org_id match, failing to enforce sharing-group membership and event-level ACL. This is a classic case of insufficient authorization logic rather than a completely missing check, making CWE-285 more precise than CWE-862."
                  }
                ]
              }
            },
            "bcp-05-x-03": {
              "x_timeline": {
                "events": [
                  {
                    "description": "Corrective change authored (79fbd4c7580adc0518581351c3d8c3d5b3ac7c97): fix: [security] Apply the thread ACL when posting to a",
                    "id": "evt-fix-developed-1",
                    "references": [
                      "https://github.com/MISP/MISP/commit/79fbd4c75.patch"
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                    "timestamp": "2026-09-23T13:27:08Z",
                    "type": "fix-developed"
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            }
          },
          "recordType": "advisory",
          "vulnId": "GCVE-1-2026-20244"
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  },
  "cveMetadata": {
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    "assignerShortName": "CIRCL",
    "cveId": "CVE-2026-103858",
    "datePublished": "2026-10-01T11:31:32.840Z",
    "dateReserved": "2026-10-01T11:31:31.101Z",
    "dateUpdated": "2026-10-01T15:00:57.587Z",
    "state": "PUBLISHED"
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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-103664",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
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                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-01T15:06:14.886463Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-01T15:06:25.374Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:misp:misp:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "AttributesController::viewAnalystData",
            "ObjectsController::viewAnalystData",
            "Analyst_data view templates"
          ],
          "product": "MISP",
          "programFiles": [
            "app/Controller/AttributesController.php",
            "app/Controller/ObjectsController.php",
            "app/View/Elements/genericElements/Analyst_data/generic_simple.ctp",
            "app/View/Elements/genericElements/Analyst_data/thread.ctp"
          ],
          "repo": "https://github.com/MISP/MISP",
          "vendor": "MISP",
          "versions": [
            {
              "lessThan": "2.5.48",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
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        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Jeroen Pinoy"
        },
        {
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          "type": "remediation developer",
          "value": "iglocska"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Claude Opus 5.5 (1M context)"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
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              "value": "\u003cp\u003eMISP contains a reflected cross-site scripting (XSS) vulnerability in the analyst data notes panel. The seed path parameter, supplied by the user via the URL, was passed directly into inline JavaScript within the rendered HTML response without any sanitization or type enforcement.\u003c/p\u003e\u003cp\u003eAn attacker who can convince an authenticated MISP user to navigate to a crafted URL (for example, via a phishing link) can inject arbitrary JavaScript that executes in the victim\u0027s browser context. This may allow the attacker to read session tokens, manipulate the page, or perform actions on behalf of the victim.\u003c/p\u003e\u003cp\u003ePreconditions:\u003c/p\u003e\u003cp\u003e- The victim must be authenticated to MISP and access the analyst data view for an attribute or object.\u003c/p\u003e\u003cp\u003e- The attacker must supply a malicious seed value in the URL path.\u003c/p\u003e\u003cp\u003eImpact:\u003c/p\u003e\u003cp\u003e- Execution of arbitrary JavaScript in the victim\u0027s browser session.\u003c/p\u003e\u003cp\u003e- Potential theft of session credentials or sensitive data visible in the page.\u003c/p\u003e\u003cp\u003e- Manipulation of the analyst data interface.\u003c/p\u003e\u003cp\u003eAffected: MISP versions prior to the fix (commit 58925dbf0, post v2.5.48).\u003c/p\u003e"
            }
          ],
          "value": "MISP contains a reflected cross-site scripting (XSS) vulnerability in the analyst data notes panel. The seed path parameter, supplied by the user via the URL, was passed directly into inline JavaScript within the rendered HTML response without any sanitization or type enforcement.\n\nAn attacker who can convince an authenticated MISP user to navigate to a crafted URL (for example, via a phishing link) can inject arbitrary JavaScript that executes in the victim\u0027s browser context. This may allow the attacker to read session tokens, manipulate the page, or perform actions on behalf of the victim.\n\nPreconditions:\n\n- The victim must be authenticated to MISP and access the analyst data view for an attribute or object.\n\n- The attacker must supply a malicious seed value in the URL path.\n\nImpact:\n\n- Execution of arbitrary JavaScript in the victim\u0027s browser session.\n\n- Potential theft of session credentials or sensitive data visible in the page.\n\n- Manipulation of the analyst data interface.\n\nAffected: MISP versions prior to the fix (commit 58925dbf0, post v2.5.48)."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-1",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-1 XSS - Reflected"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 4.8,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
            "userInteraction": "ACTIVE",
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            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
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            "vulnConfidentialityImpact": "NONE",
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          "format": "CVSS",
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              "value": "GENERAL"
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          "format": "SSVC",
          "other": {
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              "timestamp": "2026-10-01T08:49:54Z",
              "version": "2.0.3"
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              "value": "GENERAL"
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      "problemTypes": [
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          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-01T08:55:51.589Z",
        "orgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
        "shortName": "CIRCL"
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      "references": [
        {
          "name": "Security patch",
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            "patch"
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          "url": "https://github.com/MISP/MISP/commit/58925dbf0"
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      "solutions": [
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          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eThe vulnerability is remediated by enforcing integer type on the seed parameter at both the controller layer and the view/template layer. Casting the value to an integer ensures that any non-numeric input (including script payloads) is neutralized before it reaches the inline JavaScript context, eliminating the injection vector.\u003c/p\u003e"
            }
          ],
          "value": "The vulnerability is remediated by enforcing integer type on the seed parameter at both the controller layer and the view/template layer. Casting the value to an integer ensures that any non-numeric input (including script payloads) is neutralized before it reaches the inline JavaScript context, eliminating the injection vector."
        }
      ],
      "title": "MISP Reflected Cross-Site Scripting via Unsanitized Analyst Data Seed Parameter",
      "x_gcve": [
        {
          "extensions": {
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              "ai_annotations": [
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            },
            "bcp-05-x-02": {
              "x_patch2vuln": {
                "assumptions": [
                  "MISP requires user authentication to access the analyst data views; PR:L assumes a low-privilege authenticated account is sufficient for the attacker to craft or deliver the malicious URL.",
                  "The exact fixed version number is not stated in the patch; the fix commit is 32 commits after the v2.5.48 tag, so the fixed version is presumed to be a release after 2.5.48.",
                  "The UI:A rating assumes the victim must click a link or navigate to the crafted URL; if the seed could be injected via a different vector requiring no user interaction, UI could be None.",
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                "timestamp": "2026-09-30T14:58:27.715153Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
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          "dateUpdated": "2026-09-30T15:28:06.728Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:misp:misp:*:*:*:*:*:*:*:*"
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          "modules": [
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            "Correlation Graph (default theme)",
            "Correlation Graph (Overmind theme)",
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          ],
          "product": "MISP",
          "programFiles": [
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            "app/Lib/Tools/CorrelationGraphTool.php",
            "app/webroot/js/correlation-graph.js",
            "app/webroot/js/correlation-graphOvermind.js"
          ],
          "repo": "https://github.com/MISP/MISP",
          "vendor": "MISP",
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            {
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              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
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        }
      ],
      "credits": [
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          "lang": "en",
          "type": "reporter",
          "value": "Jeroen Pinoy"
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          "type": "remediation developer",
          "value": "iglocska"
        },
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      ],
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          "lang": "en",
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              "value": "\u003cp\u003eMISP contains a stored cross-site scripting (XSS) vulnerability in the galaxy icon handling path. The icon field of a galaxy object was persisted without any server-side validation through the galaxy add, edit, and sync/import capture endpoints. The stored value was subsequently concatenated directly into HTML markup by the D3-based correlation graph rendering scripts (both the default and Overmind themes) using the .html() method.\u003c/p\u003e\u003cp\u003eA user holding the perm_galaxy_editor permission, which is granted to the stock User role, could store arbitrary HTML or JavaScript in the icon field. Any other user who opened the correlation graph of an event containing a cluster belonging to that galaxy would have the injected script executed in their browser session.\u003c/p\u003e\u003cp\u003eImpact:\u003c/p\u003e\u003cp\u003e- Arbitrary script execution in the context of the victim\u0027s MISP session\u003c/p\u003e\u003cp\u003e- Potential theft of session credentials, manipulation of displayed data, or initiation of actions on behalf of the victim\u003c/p\u003e\u003cp\u003e- Affects both the default and Overmind UI themes\u003c/p\u003e\u003cp\u003eAffected versions: \u0026lt;2.5.48\u003c/p\u003e"
            }
          ],
          "value": "MISP contains a stored cross-site scripting (XSS) vulnerability in the galaxy icon handling path. The icon field of a galaxy object was persisted without any server-side validation through the galaxy add, edit, and sync/import capture endpoints. The stored value was subsequently concatenated directly into HTML markup by the D3-based correlation graph rendering scripts (both the default and Overmind themes) using the .html() method.\n\nA user holding the perm_galaxy_editor permission, which is granted to the stock User role, could store arbitrary HTML or JavaScript in the icon field. Any other user who opened the correlation graph of an event containing a cluster belonging to that galaxy would have the injected script executed in their browser session.\n\nImpact:\n\n- Arbitrary script execution in the context of the victim\u0027s MISP session\n\n- Potential theft of session credentials, manipulation of displayed data, or initiation of actions on behalf of the victim\n\n- Affects both the default and Overmind UI themes\n\nAffected versions: \u003c2.5.48"
        }
      ],
      "impacts": [
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          "capecId": "CAPEC-1",
          "descriptions": [
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              "value": "CAPEC-1 Cross Site Scripting"
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          ]
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      "metrics": [
        {
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            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
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            "baseSeverity": "MEDIUM",
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            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
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            "subIntegrityImpact": "HIGH",
            "userInteraction": "ACTIVE",
            "valueDensity": "NOT_DEFINED",
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            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
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          "format": "CVSS",
          "scenarios": [
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              "lang": "en",
              "value": "GENERAL"
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        }
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      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
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              "cweId": "CWE-20",
              "description": "CWE-20 Improper Input Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-30T14:25:59.230Z",
        "orgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
        "shortName": "CIRCL"
      },
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          "tags": [
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          "url": "https://github.com/MISP/MISP/commit/8ea5783dd"
        }
      ],
      "solutions": [
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          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eThe vulnerability is remediated by enforcing strict input validation on the galaxy icon field so that only valid Font Awesome icon names (lowercase alphanumeric characters and dashes) are accepted at write time. The sync/import capture path discards any icon value that does not conform. The correlation graph JSON generation falls back to a safe default icon for any previously stored invalid value. On the client side, both correlation graph scripts now set the icon as a CSS class attribute rather than injecting it as raw HTML, and apply an additional regex sanitization pass. The asset cache-busting version is incremented to ensure browsers load the corrected scripts.\u003c/p\u003e"
            }
          ],
          "value": "The vulnerability is remediated by enforcing strict input validation on the galaxy icon field so that only valid Font Awesome icon names (lowercase alphanumeric characters and dashes) are accepted at write time. The sync/import capture path discards any icon value that does not conform. The correlation graph JSON generation falls back to a safe default icon for any previously stored invalid value. On the client side, both correlation graph scripts now set the icon as a CSS class attribute rather than injecting it as raw HTML, and apply an additional regex sanitization pass. The asset cache-busting version is incremented to ensure browsers load the corrected scripts."
        }
      ],
      "title": "MISP Stored Cross-Site Scripting via Unvalidated Galaxy Icon Field in Correlation Graph",
      "x_gcve": [
        {
          "extensions": {
            "bcp-05-x-01": {
              "ai_annotations": [
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                  "description": "Draft vulnerability metadata was generated from a git-format patch using an Ollama-hosted language model. Human validation is required before publication.",
                  "gna_source": 1,
                  "models": [
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                      "gna_source": 1,
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                "assumptions": [
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                  "The perm_galaxy_editor permission is assumed to be granted to the stock User role as stated in the commit message; the exact role-permission mapping was not independently verified from the patch.",
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                  "CVSS UI:A assumes the victim must navigate to the correlation graph view of a specific event; if the graph is auto-loaded on a commonly visited page, UI could be lowered to Passive.",
                  "The Co-Authored-By line references an AI assistant (Claude Fable 5.1); it is recorded as a tool credit rather than a human remediation developer."
                ],
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                "fixSummary": "The vulnerability is remediated by enforcing strict input validation on the galaxy icon field so that only valid Font Awesome icon names (lowercase alphanumeric characters and dashes) are accepted at write time. The sync/import capture path discards any icon value that does not conform. The correlation graph JSON generation falls back to a safe default icon for any previously stored invalid value. On the client side, both correlation graph scripts now set the icon as a CSS class attribute rather than injecting it as raw HTML, and apply an additional regex sanitization pass. The asset cache-busting version is incremented to ensure browsers load the corrected scripts.",
                "generatedAt": "2026-09-30T14:24:01.890608Z",
                "generator": "patch2vuln.py",
                "model": "qwen3.8:27b",
                "modelComparison": {
                  "rankings": [
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                      "agreementScore": 9,
                      "assumptionCount": 5,
                      "confidence": "high",
                      "model": "qwen3.8:27b",
                      "score": 6
                    }
                  ],
                  "selectedModel": "qwen3.8:27b",
                  "selectionMethod": "deterministic-consensus-v1",
                  "selectionNotice": "The selected result is closest to model consensus; this heuristic does not establish factual correctness and human review remains required."
                },
                "patchSha256": "382869c811e8df5875a463c4b6275f754f4969445196f08d708cfee926528b0f",
                "patchSummary": "Added a static isValidIconName() method and a regex constant (ICON_NAME_PATTERN) to the Galaxy model, plus a model-level validation rule restricting the icon field to lowercase letters, digits, and dashes. The captureGalaxy() method now blanks out any icon value that fails validation before persistence. CorrelationGraphTool::__createNode() now checks the icon against the validator and substitutes \u0027globe\u0027 for invalid stored values. Both correlation-graph.js and correlation-graphOvermind.js were changed from .html() string concatenation to .attr(\u0027class\u0027, ...) with a regex strip of non-conforming characters. AppController asset query version bumped from 225 to 226. A new PHPUnit test file (GalaxyIconNameTest.php) validates the icon name rule against known-good and known-bad payloads including the originally reported XSS vector.",
                "patchTruncated": false,
                "patches": [
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                    "source": "https://github.com/MISP/MISP/commit/8ea5783dd.patch",
                    "sourceUrl": "https://github.com/MISP/MISP/commit/8ea5783dd.patch",
                    "subject": "fix: [security] Galaxy icons are icon names, and the"
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                "subject": "fix: [security] Galaxy icons are icon names, and the",
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                    "cweId": "CWE-79",
                    "rationale": "The galaxy icon field was stored without validation and later rendered into the DOM via D3 .html(), allowing an attacker to inject and execute arbitrary script in the victim\u0027s browser. This is a textbook stored XSS."
                  },
                  {
                    "cweId": "CWE-20",
                    "rationale": "The root enabler is the absence of any server-side validation on the icon field at write time (add, edit, capture). The field accepted arbitrary strings including HTML markup, which was the precondition for the XSS."
                  }
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          "recordType": "advisory",
          "vulnId": "GCVE-1-2026-20142"
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    "dateReserved": "2026-09-30T14:25:56.802Z",
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{
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              "value": "\u003cp\u003eMISP renders the source field of a Galaxy Cluster as a clickable hyperlink whenever the stored value passes PHP\u0027s FILTER_VALIDATE_URL validation. Because FILTER_VALIDATE_URL accepts the javascript: URI scheme, a user with galaxy editor privileges on the local instance or on a synced instance could store a javascript: URL as the cluster source.\u003c/p\u003e\u003cp\u003eWhen another user views the affected Galaxy Cluster and clicks the rendered link, the embedded script executes in the victim\u0027s browser context, enabling session hijacking, data exfiltration, or actions performed on behalf of the victim.\u003c/p\u003e\u003cp\u003ePreconditions:\u003c/p\u003e\u003cp\u003e- Attacker must hold galaxy editor privileges (local or via sync).\u003c/p\u003e\u003cp\u003e- Victim must view the affected cluster and click the malicious link.\u003c/p\u003e\u003cp\u003eImpact:\u003c/p\u003e\u003cp\u003e- Stored cross-site scripting (XSS) in the victim\u0027s browser.\u003c/p\u003e\u003cp\u003e- Potential session theft, credential harvesting, or unauthorized actions within the MISP application.\u003c/p\u003e\u003cp\u003eAffected: \u0026lt;2.5.48.\u003c/p\u003e"
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              "value": "\u003cp\u003eThe fix restricts the rendering of the Galaxy Cluster source field as a hyperlink to only http:// and https:// URLs by adding a regular-expression check (preg_match for ^https?://) in addition to the existing FILTER_VALIDATE_URL validation. This prevents javascript: and other non-HTTP URI schemes from being rendered as clickable links, eliminating the stored XSS vector. The change is applied consistently in both the default theme and the Overmind theme.\u003c/p\u003e"
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          "value": "The fix restricts the rendering of the Galaxy Cluster source field as a hyperlink to only http:// and https:// URLs by adding a regular-expression check (preg_match for ^https?://) in addition to the existing FILTER_VALIDATE_URL validation. This prevents javascript: and other non-HTTP URI schemes from being rendered as clickable links, eliminating the stored XSS vector. The change is applied consistently in both the default theme and the Overmind theme."
        }
      ],
      "title": "MISP Stored Cross-Site Scripting via JavaScript URL in Galaxy Cluster Source Field",
      "x_gcve": [
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                "cvssRationale": "AV:N \u2013 MISP is a web application accessed over the network. AC:L \u2013 no race conditions or special environment needed; storing a javascript: URL is straightforward. AT:N \u2013 no manipulation of the attack target required. PR:L \u2013 attacker needs galaxy editor privileges (authenticated, non-admin role). UI:A \u2013 victim must click the malicious link for script execution. VC/VI/VA:N \u2013 the MISP server itself is not directly compromised; impact is on the victim\u0027s browser. SC:H \u2013 attacker can read cookies, session tokens, and manipulate the DOM in the victim\u0027s session. SI:H \u2013 attacker can perform actions on behalf of the victim within MISP. SA:N \u2013 no direct compromise of the application\u0027s security controls or system integrity.",
                "fixSummary": "The fix restricts the rendering of the Galaxy Cluster source field as a hyperlink to only http:// and https:// URLs by adding a regular-expression check (preg_match for ^https?://) in addition to the existing FILTER_VALIDATE_URL validation. This prevents javascript: and other non-HTTP URI schemes from being rendered as clickable links, eliminating the stored XSS vector. The change is applied consistently in both the default theme and the Overmind theme.",
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                "patchSummary": "Two view templates are modified. In app/View/GalaxyClusters/view.ctp, the source value is extracted into a local variable and the conditional for rendering an anchor tag now requires both FILTER_VALIDATE_URL and a preg_match against /^https?:\\/\\//i. In app/View/Themed/Overmind/Elements/GalaxyClusters/View/galaxy_clusters_general.ctp, the same preg_match guard is added to the existing FILTER_VALIDATE_URL check. Net effect: only http(s) URLs produce a clickable link; all other values (including javascript:) are rendered as plain escaped text.",
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                    "source": "https://github.com/MISP/MISP/commit/118528767.patch",
                    "sourceUrl": "https://github.com/MISP/MISP/commit/118528767.patch",
                    "subject": "fix: [security] Link a galaxy cluster source only when it is"
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          "url": "https://github.com/MISP/MISP/commit/92c7ccc43"
        }
      ],
      "solutions": [
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          "supportingMedia": [
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              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eThe vulnerability is remediated by enforcing strict server-side validation of the preview image field, restricting it to a well-formed base64-encoded PNG data URL, and by replacing the client-side string-concatenation rendering with DOM-based attribute assignment that does not interpret the value as HTML.\u003c/p\u003e"
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        }
      ],
      "title": "MISP Stored Cross-Site Scripting (XSS) via Unvalidated Event Graph Preview Image",
      "x_gcve": [
        {
          "extensions": {
            "bcp-05-x-01": {
              "ai_annotations": [
                {
                  "ai_level": "generated",
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                  "models": [
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                      "gna_source": 1,
                      "identifier": "qwen3.8:27b",
                      "name": "qwen3.8:27b",
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            "bcp-05-x-02": {
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                "assumptions": [
                  "The affected version range is inferred from the tag_version_boundary (v2.5.48 with 43 commits after the fix); the exact fixed release version is not stated in the patch metadata.",
                  "PR:L assumes the attacker needs at least a basic authenticated MISP account to create or modify an event graph entry; the patch does not specify the exact permission level required.",
                  "UI:P assumes the victim triggers the XSS by viewing the event graph preview as part of normal workflow (hovering the plot button), which is a passive interaction rather than an active click on a crafted link.",
                  "The CAPEC-1 mapping is direct and unambiguous given the explicit stored XSS identification in the commit message.",
                  "The Co-Authored-By line referencing Claude Opus 4.8 is treated as a tool credit per the commit metadata; it is not a human contributor."
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                "fixSummary": "The vulnerability is remediated by enforcing strict server-side validation of the preview image field, restricting it to a well-formed base64-encoded PNG data URL, and by replacing the client-side string-concatenation rendering with DOM-based attribute assignment that does not interpret the value as HTML.",
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              "value": "\u003cp\u003eThe fix replaces the bulk-association save call with an explicit two-step process: first, only the TagCollection data is extracted from the request and saved via a plain save() operation that does not write belongsTo siblings; second, tag association rows are persisted individually in a controlled loop. This ensures that any User, Organisation, or other sibling model data present in the request payload is silently discarded and never reaches the database, eliminating the privilege escalation path.\u003c/p\u003e"
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      ],
      "title": "MISP Tag Collection Save Allows Privilege Escalation via Sibling Model Injection",
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      "title": "MISP: Nested Model Alias Key Bypasses Sanitization to Modify Cross-Tenant Rows",
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      ],
      "title": "MISP Reflected Cross-Site Scripting via Unsanitized Analyst Data Seed Parameter",
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          "value": "MISP contains a reflected cross-site scripting (XSS) vulnerability in the legacy taxonomy tag management confirmation forms (add tag and disable tag).\n\nThe affected forms echoed a user-supplied tag name value from the request unescaped into the rendered HTML output. An attacker who can induce a site administrator to visit a crafted URL containing a malicious tag name parameter can execute arbitrary JavaScript in the administrator\u0027s browser session.\n\nPreconditions:\n\n- The target must be running a MISP instance with the legacy taxonomy tag confirmation views enabled.\n\n- The victim must be an authenticated site administrator.\n\n- The victim must navigate to the attacker-crafted URL (e.g., via a phishing link).\n\nSecurity impact:\n\n- Execution of arbitrary client-side script in the context of the administrator\u0027s browser.\n\n- Potential theft of session tokens, CSRF tokens, or other sensitive data accessible from the page.\n\n- Potential for performing privileged actions on behalf of the administrator within the MISP interface.\n\nAffected versions: \u003c2.5.48."
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            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "LOW",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
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              "role": "Supplier",
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      "problemTypes": [
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            {
              "cweId": "CWE-79",
              "description": "CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
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              "type": "CWE"
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        "orgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
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          "tags": [
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          "url": "https://github.com/MISP/MISP/commit/9619083c8"
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      ],
      "title": "MISP Reflected XSS in Taxonomy Tag Confirmation Forms",
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                  "The tag v2.5.48 is assumed to be the first release containing the fix based on the tag_version_boundary metadata showing 44 commits after the fix commit; the exact release version that first shipped the fix is not explicitly stated.",
                  "The vulnerability requires the legacy taxonomy tag confirmation views to be in use; if MISP has migrated to a different UI for taxonomy management, the attack surface may not be reachable.",
                  "PR:N is assumed because the attacker does not need their own MISP account; they only need to deliver a crafted URL to an authenticated admin. If the form is only reachable via authenticated session and the parameter cannot be injected via URL for unauthenticated users, PR could be elevated.",
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                    "rationale": "The patch directly addresses a reflected XSS: user-controlled input from the request is echoed into HTML output without encoding. The fix applies HTML entity encoding (h() helper), which is the canonical remediation for CWE-79."
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                  "The CVSS PR:L assumes the attacker needs at minimum a read-access role on the community event; no evidence supports a lower or higher privilege requirement.",
                  "The CAPEC-126 mapping is the closest available pattern; no CAPEC specifically describes a missing per-object ACL in a flattened API response. The mapping is approximate.",
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                  },
                  {
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                    "value": "Claude Fable 5.1"
                  },
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                    "type": "tool",
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                ],
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                "fixSummary": "The vulnerability is remediated by enforcing strict input validation on the galaxy icon field so that only valid Font Awesome icon names (lowercase alphanumeric characters and dashes) are accepted at write time. The sync/import capture path discards any icon value that does not conform. The correlation graph JSON generation falls back to a safe default icon for any previously stored invalid value. On the client side, both correlation graph scripts now set the icon as a CSS class attribute rather than injecting it as raw HTML, and apply an additional regex sanitization pass. The asset cache-busting version is incremented to ensure browsers load the corrected scripts.",
                "generatedAt": "2026-09-30T14:24:01.890608Z",
                "generator": "patch2vuln.py",
                "model": "qwen3.8:27b",
                "modelComparison": {
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                      "agreementScore": 9,
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                  "selectionMethod": "deterministic-consensus-v1",
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                },
                "patchSha256": "382869c811e8df5875a463c4b6275f754f4969445196f08d708cfee926528b0f",
                "patchSummary": "Added a static isValidIconName() method and a regex constant (ICON_NAME_PATTERN) to the Galaxy model, plus a model-level validation rule restricting the icon field to lowercase letters, digits, and dashes. The captureGalaxy() method now blanks out any icon value that fails validation before persistence. CorrelationGraphTool::__createNode() now checks the icon against the validator and substitutes \u0027globe\u0027 for invalid stored values. Both correlation-graph.js and correlation-graphOvermind.js were changed from .html() string concatenation to .attr(\u0027class\u0027, ...) with a regex strip of non-conforming characters. AppController asset query version bumped from 225 to 226. A new PHPUnit test file (GalaxyIconNameTest.php) validates the icon name rule against known-good and known-bad payloads including the originally reported XSS vector.",
                "patchTruncated": false,
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                    "source": "https://github.com/MISP/MISP/commit/8ea5783dd.patch",
                    "sourceUrl": "https://github.com/MISP/MISP/commit/8ea5783dd.patch",
                    "subject": "fix: [security] Galaxy icons are icon names, and the"
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                    "cweId": "CWE-79",
                    "rationale": "The galaxy icon field was stored without validation and later rendered into the DOM via D3 .html(), allowing an attacker to inject and execute arbitrary script in the victim\u0027s browser. This is a textbook stored XSS."
                  },
                  {
                    "cweId": "CWE-20",
                    "rationale": "The root enabler is the absence of any server-side validation on the icon field at write time (add, edit, capture). The field accepted arbitrary strings including HTML markup, which was the precondition for the XSS."
                  }
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    "dateReserved": "2026-09-30T14:25:56.802Z",
    "dateUpdated": "2026-09-30T15:28:06.728Z",
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              "value": "\u003cp\u003eMISP renders the source field of a Galaxy Cluster as a clickable hyperlink whenever the stored value passes PHP\u0027s FILTER_VALIDATE_URL validation. Because FILTER_VALIDATE_URL accepts the javascript: URI scheme, a user with galaxy editor privileges on the local instance or on a synced instance could store a javascript: URL as the cluster source.\u003c/p\u003e\u003cp\u003eWhen another user views the affected Galaxy Cluster and clicks the rendered link, the embedded script executes in the victim\u0027s browser context, enabling session hijacking, data exfiltration, or actions performed on behalf of the victim.\u003c/p\u003e\u003cp\u003ePreconditions:\u003c/p\u003e\u003cp\u003e- Attacker must hold galaxy editor privileges (local or via sync).\u003c/p\u003e\u003cp\u003e- Victim must view the affected cluster and click the malicious link.\u003c/p\u003e\u003cp\u003eImpact:\u003c/p\u003e\u003cp\u003e- Stored cross-site scripting (XSS) in the victim\u0027s browser.\u003c/p\u003e\u003cp\u003e- Potential session theft, credential harvesting, or unauthorized actions within the MISP application.\u003c/p\u003e\u003cp\u003eAffected: \u0026lt;2.5.48.\u003c/p\u003e"
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              "type": "CWE"
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          "url": "https://github.com/MISP/MISP/commit/118528767"
        }
      ],
      "solutions": [
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              "type": "text/html",
              "value": "\u003cp\u003eThe fix restricts the rendering of the Galaxy Cluster source field as a hyperlink to only http:// and https:// URLs by adding a regular-expression check (preg_match for ^https?://) in addition to the existing FILTER_VALIDATE_URL validation. This prevents javascript: and other non-HTTP URI schemes from being rendered as clickable links, eliminating the stored XSS vector. The change is applied consistently in both the default theme and the Overmind theme.\u003c/p\u003e"
            }
          ],
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        }
      ],
      "title": "MISP Stored Cross-Site Scripting via JavaScript URL in Galaxy Cluster Source Field",
      "x_gcve": [
        {
          "extensions": {
            "bcp-05-x-01": {
              "ai_annotations": [
                {
                  "ai_level": "generated",
                  "description": "Draft vulnerability metadata was generated from a git-format patch using an Ollama-hosted language model. Human validation is required before publication.",
                  "gna_source": 1,
                  "models": [
                    {
                      "gna_source": 1,
                      "identifier": "qwen3.8:27b",
                      "name": "qwen3.8:27b",
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                  ],
                  "review_status": "full",
                  "scope": "record",
                  "tags": [
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                    "ai-computer-assisted:classification"
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            },
            "bcp-05-x-02": {
              "x_patch2vuln": {
                "assumptions": [
                  "The affected version boundary is inferred from the tag_version_boundary metadata (v2.5.48, 26 commits after fix); the exact first affected release is not stated in the patch.",
                  "PR:L assumes galaxy editor privileges are a non-admin, role-based permission; the exact privilege model is not detailed in the patch.",
                  "UI:A assumes the victim must actively click the rendered link; passive rendering without click does not execute the script.",
                  "The CAPEC-64 mapping is the closest available pattern for stored XSS; no CAPEC specifically covers URI-scheme-based stored XSS, so CAPEC-64 is the best fit.",
                  "The Co-Authored-By line references an AI assistant; it is credited as a tool rather than a human remediation developer."
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                    "capecId": "CAPEC-64",
                    "rationale": "The attack pattern involves storing a malicious payload (a javascript: URL) in a persistent data field (galaxy cluster source) that is later rendered in a web page, executing script in the victim\u0027s browser upon interaction. This is a textbook persistent/stored XSS. CAPEC-64 is the closest and most precise match in the CAPEC catalog."
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                ],
                "cvssRationale": "AV:N \u2013 MISP is a web application accessed over the network. AC:L \u2013 no race conditions or special environment needed; storing a javascript: URL is straightforward. AT:N \u2013 no manipulation of the attack target required. PR:L \u2013 attacker needs galaxy editor privileges (authenticated, non-admin role). UI:A \u2013 victim must click the malicious link for script execution. VC/VI/VA:N \u2013 the MISP server itself is not directly compromised; impact is on the victim\u0027s browser. SC:H \u2013 attacker can read cookies, session tokens, and manipulate the DOM in the victim\u0027s session. SI:H \u2013 attacker can perform actions on behalf of the victim within MISP. SA:N \u2013 no direct compromise of the application\u0027s security controls or system integrity.",
                "fixSummary": "The fix restricts the rendering of the Galaxy Cluster source field as a hyperlink to only http:// and https:// URLs by adding a regular-expression check (preg_match for ^https?://) in addition to the existing FILTER_VALIDATE_URL validation. This prevents javascript: and other non-HTTP URI schemes from being rendered as clickable links, eliminating the stored XSS vector. The change is applied consistently in both the default theme and the Overmind theme.",
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                "patchSummary": "Two view templates are modified. In app/View/GalaxyClusters/view.ctp, the source value is extracted into a local variable and the conditional for rendering an anchor tag now requires both FILTER_VALIDATE_URL and a preg_match against /^https?:\\/\\//i. In app/View/Themed/Overmind/Elements/GalaxyClusters/View/galaxy_clusters_general.ctp, the same preg_match guard is added to the existing FILTER_VALIDATE_URL check. Net effect: only http(s) URLs produce a clickable link; all other values (including javascript:) are rendered as plain escaped text.",
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                    "sourceUrl": "https://github.com/MISP/MISP/commit/118528767.patch",
                    "subject": "fix: [security] Link a galaxy cluster source only when it is"
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                    "rationale": "The application renders user-controlled data (the galaxy cluster source field) into an HTML anchor tag without restricting the URI scheme to safe values. Although output is HTML-escaped via h(), the href attribute still accepts javascript: URIs, resulting in stored XSS. CWE-79 is the narrowest defensible mapping."
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              "value": "\u003cp\u003eMISP contains a stored cross-site script (XSS) vulnerability in the event graph preview feature.\u003c/p\u003e\u003cp\u003eThe event graph preview image field was accepted and stored without server-side validation. On the client side, the stored value was rendered into an HTML img element\u0027s src attribute via string concatenation, allowing a crafted value to break out of the attribute context and inject arbitrary script.\u003c/p\u003e\u003cp\u003ePreconditions:\u003c/p\u003e\u003cp\u003e- An authenticated MISP user with the ability to create or modify an event graph entry.\u003c/p\u003e\u003cp\u003e- A second user (the victim) who views the event graph and triggers the preview popover.\u003c/p\u003e\u003cp\u003eImpact:\u003c/p\u003e\u003cp\u003e- Execution of arbitrary JavaScript in the victim\u0027s browser within the MISP application context.\u003c/p\u003e\u003cp\u003e- Potential theft of session tokens, cookies, or sensitive data accessible to the victim\u0027s browser.\u003c/p\u003e\u003cp\u003e- Potential for performing actions on behalf of the victim within the MISP application.\u003c/p\u003e\u003cp\u003eAffected: MISP versions prior to the fix (commit applied after v2.5.48).\u003c/p\u003e"
            }
          ],
          "value": "MISP contains a stored cross-site script (XSS) vulnerability in the event graph preview feature.\n\nThe event graph preview image field was accepted and stored without server-side validation. On the client side, the stored value was rendered into an HTML img element\u0027s src attribute via string concatenation, allowing a crafted value to break out of the attribute context and inject arbitrary script.\n\nPreconditions:\n\n- An authenticated MISP user with the ability to create or modify an event graph entry.\n\n- A second user (the victim) who views the event graph and triggers the preview popover.\n\nImpact:\n\n- Execution of arbitrary JavaScript in the victim\u0027s browser within the MISP application context.\n\n- Potential theft of session tokens, cookies, or sensitive data accessible to the victim\u0027s browser.\n\n- Potential for performing actions on behalf of the victim within the MISP application.\n\nAffected: MISP versions prior to the fix (commit applied after v2.5.48)."
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      "impacts": [
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            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "HIGH",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:H/VA:N/SC:H/SI:H/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "CWE-20 Improper Input Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-30T12:19:01.829Z",
        "orgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
        "shortName": "CIRCL"
      },
      "references": [
        {
          "name": "Security patch",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/MISP/MISP/commit/92c7ccc43"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eThe vulnerability is remediated by enforcing strict server-side validation of the preview image field, restricting it to a well-formed base64-encoded PNG data URL, and by replacing the client-side string-concatenation rendering with DOM-based attribute assignment that does not interpret the value as HTML.\u003c/p\u003e"
            }
          ],
          "value": "The vulnerability is remediated by enforcing strict server-side validation of the preview image field, restricting it to a well-formed base64-encoded PNG data URL, and by replacing the client-side string-concatenation rendering with DOM-based attribute assignment that does not interpret the value as HTML."
        }
      ],
      "title": "MISP Stored Cross-Site Scripting (XSS) via Unvalidated Event Graph Preview Image",
      "x_gcve": [
        {
          "extensions": {
            "bcp-05-x-01": {
              "ai_annotations": [
                {
                  "ai_level": "generated",
                  "description": "Draft vulnerability metadata was generated from a git-format patch using an Ollama-hosted language model. Human validation is required before publication.",
                  "gna_source": 1,
                  "models": [
                    {
                      "gna_source": 1,
                      "identifier": "qwen3.8:27b",
                      "name": "qwen3.8:27b",
                      "source": "ollama"
                    }
                  ],
                  "review_status": "full",
                  "scope": "record",
                  "tags": [
                    "ai-computer-assisted:llm-generated",
                    "ai-computer-assisted:classification"
                  ]
                }
              ]
            },
            "bcp-05-x-02": {
              "x_patch2vuln": {
                "assumptions": [
                  "The affected version range is inferred from the tag_version_boundary (v2.5.48 with 43 commits after the fix); the exact fixed release version is not stated in the patch metadata.",
                  "PR:L assumes the attacker needs at least a basic authenticated MISP account to create or modify an event graph entry; the patch does not specify the exact permission level required.",
                  "UI:P assumes the victim triggers the XSS by viewing the event graph preview as part of normal workflow (hovering the plot button), which is a passive interaction rather than an active click on a crafted link.",
                  "The CAPEC-1 mapping is direct and unambiguous given the explicit stored XSS identification in the commit message.",
                  "The Co-Authored-By line referencing Claude Opus 4.8 is treated as a tool credit per the commit metadata; it is not a human contributor."
                ],
                "capecRationale": [
                  {
                    "capecId": "CAPEC-1",
                    "rationale": "The patch directly addresses a stored XSS where attacker-controlled data is rendered into a web page without proper encoding or validation. CAPEC-1 is the canonical attack pattern for XSS and is the closest match. No uncertainty in this mapping; the commit message explicitly identifies the issue as stored XSS."
                  }
                ],
                "commit": "92c7ccc4398a64e61699bd79fb4010703616fc59",
                "confidence": "high",
                "credits": [
                  {
                    "lang": "en",
                    "type": "reporter",
                    "value": "Bastien Bossiroy of NCIA"
                  },
                  {
                    "lang": "en",
                    "type": "remediation developer",
                    "value": "iglocska"
                  },
                  {
                    "lang": "en",
                    "type": "remediation developer",
                    "value": "Claude Opus 4.8"
                  }
                ],
                "cvssRationale": "AV:N: exploited over the network via the MISP web interface. AC:L: no race conditions or special conditions required; storing a crafted value and viewing the graph is straightforward. AT:N: no manipulation of the attack target needed. PR:L: attacker needs a low-privilege authenticated MISP account to create/modify an event graph. UI:P: the victim passively triggers the XSS by viewing the event graph preview (hovering a button), a normal workflow action. VC/VI/VA:N: the MISP server itself is not compromised; the impact is in the victim\u0027s browser. SC:H: the attacker can read cookies, tokens, and data in the victim\u0027s session. SI:H: the attacker can perform authenticated actions as the victim. SA:N: no availability impact on the victim\u0027s system.",
                "fixSummary": "The vulnerability is remediated by enforcing strict server-side validation of the preview image field, restricting it to a well-formed base64-encoded PNG data URL, and by replacing the client-side string-concatenation rendering with DOM-based attribute assignment that does not interpret the value as HTML.",
                "generatedAt": "2026-09-30T11:21:27.655462Z",
                "generator": "patch2vuln.py",
                "model": "qwen3.8:27b",
                "modelComparison": {
                  "rankings": [
                    {
                      "agreementScore": 9,
                      "assumptionCount": 5,
                      "confidence": "high",
                      "model": "qwen3.8:27b",
                      "score": 6
                    }
                  ],
                  "selectedModel": "qwen3.8:27b",
                  "selectionMethod": "deterministic-consensus-v1",
                  "selectionNotice": "The selected result is closest to model consensus; this heuristic does not establish factual correctness and human review remains required."
                },
                "patchSha256": "0ecb893de30056bc3f9609fcb8de43d60b1cedd6a1eea7d6aa53ef6d351d642a",
                "patchSummary": "In app/Model/EventGraph.php, a new validation rule is added for the preview_img field requiring it to match the regex /^data:image\\/png;base64,[A-Za-z0-9+\\/]*={0,2}$/ (allowing empty). In app/webroot/js/event-graph.js, two occurrences of string-concatenated img tag construction (return \u0027\u003cimg ... src=\"\u0027 + value + \u0027\" /\u003e\u0027) are replaced with jQuery DOM construction using $(\u0027\u003cimg ...\u003e\u0027).prop(\u0027src\u0027, value), which sets the attribute safely without HTML parsing.",
                "patchTruncated": false,
                "patches": [
                  {
                    "commit": "92c7ccc4398a64e61699bd79fb4010703616fc59",
                    "patchSha256": "0ecb893de30056bc3f9609fcb8de43d60b1cedd6a1eea7d6aa53ef6d351d642a",
                    "source": "https://github.com/MISP/MISP/commit/92c7ccc43.patch",
                    "sourceUrl": "https://github.com/MISP/MISP/commit/92c7ccc43.patch",
                    "subject": "fix: [security] Validate the event graph preview and stop"
                  }
                ],
                "source": "https://github.com/MISP/MISP/commit/92c7ccc43.patch",
                "subject": "fix: [security] Validate the event graph preview and stop",
                "tagVersionBoundary": {
                  "commits_after_fix": 43,
                  "repository": "https://github.com/MISP/MISP",
                  "tag": "v2.5.48",
                  "version": "2.5.48",
                  "version_type": "semver"
                },
                "weaknessRationale": [
                  {
                    "cweId": "CWE-79",
                    "rationale": "The stored preview_img value was rendered into an HTML attribute via string concatenation without sufficient neutralization, enabling script injection in the victim\u0027s browser. This is a textbook stored XSS."
                  },
                  {
                    "cweId": "CWE-20",
                    "rationale": "The server accepted and persisted the preview_img field without any format validation, allowing arbitrary content to be stored and later rendered. The fix adds a strict regex validation rule."
                  }
                ]
              }
            }
          },
          "recordType": "advisory",
          "vulnId": "GCVE-1-2026-20294"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
    "assignerShortName": "CIRCL",
    "cveId": "CVE-2026-103321",
    "datePublished": "2026-09-30T12:19:01.829Z",
    "dateReserved": "2026-09-30T12:18:54.232Z",
    "dateUpdated": "2026-09-30T12:44:22.064Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}