Vulnerability-Lookup

FKIE_CVE-2026-112183

Vulnerability from fkie_nvd - Published: 2026-10-19 10:16 - Updated: 2026-10-19 18:17

Severity

4.8 (Medium) - 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

Summary

MISP contains a CSS injection vulnerability in the remote event preview feature. When a user previews an event from a linked MISP server, the colour value associated with each remote tag is written directly into an inline CSS style attribute without sufficient validation. Although HTML entity encoding is applied, the value is interpreted as CSS within the style attribute, allowing a malicious or compromised linked server to inject arbitrary CSS declarations. An attacker with the ability to create or modify tags on a linked MISP instance can craft a tag colour value containing CSS injection payloads. When a user on the local instance views the event preview, the injected CSS is rendered, potentially allowing UI manipulation, visual spoofing, or limited information disclosure through CSS-based techniques. Preconditions: - A linked MISP server relationship exists between the victim instance and the attacker-controlled instance. - The attacker can create or modify tags on the linked server. - A victim user views the remote event preview page. Affected: <2.5.48.

References

	URL	Tags
	5a6e4751-2f3f-4070-9419-94fb35b644e8	https://github.com/MISP/MISP/commit/91323b517

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:misp:misp:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "Servers/preview_event (remote event preview)"
          ],
          "product": "MISP",
          "programFiles": [
            "app/View/Servers/preview_event.ctp"
          ],
          "repo": "https://github.com/MISP/MISP",
          "vendor": "MISP",
          "versions": [
            {
              "lessThan": "2.5.48",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "MISP contains a CSS injection vulnerability in the remote event preview feature. When a user previews an event from a linked MISP server, the colour value associated with each remote tag is written directly into an inline CSS style attribute without sufficient validation. Although HTML entity encoding is applied, the value is interpreted as CSS within the style attribute, allowing a malicious or compromised linked server to inject arbitrary CSS declarations.\n\nAn attacker with the ability to create or modify tags on a linked MISP instance can craft a tag colour value containing CSS injection payloads. When a user on the local instance views the event preview, the injected CSS is rendered, potentially allowing UI manipulation, visual spoofing, or limited information disclosure through CSS-based techniques.\n\nPreconditions:\n\n- A linked MISP server relationship exists between the victim instance and the attacker-controlled instance.\n\n- The attacker can create or modify tags on the linked server.\n\n- A victim user views the remote event preview page.\n\nAffected: \u003c2.5.48."
    }
  ],
  "id": "CVE-2026-112183",
  "lastModified": "2026-10-19T18:17:03.687",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 4.8,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "LOW",
          "subIntegrityImpact": "LOW",
          "userInteraction": "ACTIVE",
          "valueDensity": "NOT_DEFINED",
          "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
        "ssvcData": {
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "Supplier",
          "timestamp": "2026-10-19T09:01:35Z",
          "version": "2.0.3"
        }
      },
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-112183",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-10-19T17:15:24.498800Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-10-19T10:16:46.970",
  "references": [
    {
      "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
      "url": "https://github.com/MISP/MISP/commit/91323b517"
    }
  ],
  "sourceIdentifier": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-74"
        }
      ],
      "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
      "type": "Secondary"
    }
  ]
}

CVE-2026-112183 (GCVE-0-2026-112183)

Vulnerability from cvelistv5 – Published: 2026-10-19 09:15 – Updated: 2026-10-19 17:15

Title

MISP CSS Injection via Remote Tag Colour in Event Preview

Summary

Severity

4.8 (Medium)


                        
                          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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

Supplier · CIRCL (v2.0.3)

Decision recorded 2026-10-19 09:01 UTC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-19 17:15 UTC

CWE

CWE-74 - Improper Neutralization of Special Elements in Output Used by a Downstream Component

Assigner

CIRCL CNA under the ENISA root

CNA scorecard A 90/100 over 244 records in the last 180 days details

References

1 reference

URL	Tags
https://github.com/MISP/MISP/commit/91323b517	patch

Impacted products

1 product

Vendor	Product	Version
MISP	MISP	Affected: 0 , < 2.5.48 (semver) cpe:2.3:a:misp:misp::::::::

Credits

iglocska Claude Opus 5.5 (1M context)

GCVE extensions

AI-generated Human-reviewed Confidence: medium Model qwen3.8:27b 1 event advisory bcp-05-x-01bcp-05-x-02bcp-05-x-03

bcp-05-x-01

AI-assisted vulnerability information annotation

GCVE-BCP-05-X-01

Whole record AI-generated Human-reviewed GNA-1

Draft vulnerability metadata was generated from a git-format patch using an Ollama-hosted language model. Human validation is required before publication.

ai-computer-assisted:llm-generatedai-computer-assisted:classification

Model	Source	Identifier
qwen3.8:27b	ollama	`qwen3.8:27b`

bcp-05-x-02

Patch-to-vulnerability generation provenance

GCVE-BCP-05-X-02

Generator: patch2vuln.py on 2026-10-19 09:01
Model: qwen3.8:27b
Input: https://github.com/MISP/MISP/commit/91323b517.patch 8be436940ffd…
Confidence: medium

Commit	Subject	Patch SHA-256
`91323b517bb5`	fix: [sync] Only use a valid colour for remote tags in the	`8be436940ffd…`

Fix summary

The fix introduces strict validation of the tag colour value before it is rendered into a CSS style attribute. Only values matching a valid six-digit hexadecimal colour pattern (e.g. #aabbcc) are accepted; any other value is replaced with a safe default (#ffffff). This prevents arbitrary CSS from being injected through the colour field, aligning the remote tag handling with the validation already applied to local tags.

Patch summary

In app/View/Servers/preview_event.ctp, a regex check (preg_match against /^#[0-9a-f]{6}$/i) is added before the tag colour is used. If the colour does not match the hex pattern, it defaults to #ffffff. The validated $colour variable replaces the raw $tag['colour'] in both the background-color style property and the getTextColour() call, eliminating the untrusted value from the CSS context.

CVSS rationale

AV:N – the attack originates from a remote linked MISP server over the network. AC:L – no race conditions or special timing; simply setting a tag colour suffices. AT:N – no manipulation of the attack target is required. PR:L – the attacker needs low-privilege access (tag creation) on the linked server. UI:A – the victim must actively navigate to the event preview page. VC:N – no direct confidentiality loss on the vulnerable system. VI:N – no integrity impact on the vulnerable system's data. VA:N – no availability impact. SC:L – CSS injection may allow limited information disclosure on the client (e.g., reading page structure via CSS selectors or side channels). SI:L – the attacker can modify the visual presentation of the preview page (UI manipulation, overlay, spoofing). SA:N – no security authority impact.

Weakness rationale

CWE-74 The tag colour value is not neutralized for the CSS context in which it is placed. HTML entity encoding (h()) does not sanitize CSS metacharacters such as semicolons, colons, or function calls, allowing CSS injection. CWE-74 is the most precise parent weakness covering injection into a downstream component (CSS) without a more specific child CWE for CSS injection.

Attack pattern rationale

CAPEC-66 The attack exploits the inherent trust between linked MISP instances. The local instance accepts and renders data (tag colours) from a remote linked server without sufficient validation, assuming the data is well-formed. The attacker leverages this trusted relationship to inject CSS. This is the closest CAPEC; no CAPEC specifically models CSS injection via trusted data sources, so CAPEC-66 is the best available match.

Assumptions to verify

The affected version boundary is inferred from the tag_version_boundary metadata (v2.5.48, 27 commits after fix); the exact first affected version is not stated in the patch.
PR:L assumes that creating or modifying a tag on a linked MISP server requires only low-level user privileges; the exact permission model was not verified from the patch.
SC:L assumes CSS injection could enable limited client-side information disclosure (e.g., via CSS selectors or layout manipulation); full XSS or data exfiltration is not evidenced.
CAPEC-66 is the closest available mapping; no CAPEC specifically models CSS injection via trusted inter-instance data, so this mapping carries uncertainty.
The commit message states the issue was found during internal review and not externally reported; no external finder or reporter is credited.
The Co-Authored-By line references an AI tool (Claude Opus 5.5); it is credited as a tool rather than a human remediation developer.

Model comparison

Selected qwen3.8:27b by deterministic-consensus-v1
The selected result is closest to model consensus; this heuristic does not establish factual correctness and human review remains required.

Model	Score	Agreement	Confidence	Assumptions
`qwen3.8:27b`	6	11	medium	6

bcp-05-x-03

Vulnerability handling and disclosure timeline

GCVE-BCP-05-X-03

2026-09-24 21:54 UTC Fix developed Corrective change authored (91323b517bb5a34f413363faf8703a3c0a1a9904): fix: [sync] Only use a valid colour for remote tags in the https://github.com/MISP/MISP/commit/91323b517.patch

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-112183",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-19T17:15:24.498800Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-19T17:15:45.687Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:misp:misp:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "Servers/preview_event (remote event preview)"
          ],
          "product": "MISP",
          "programFiles": [
            "app/View/Servers/preview_event.ctp"
          ],
          "repo": "https://github.com/MISP/MISP",
          "vendor": "MISP",
          "versions": [
            {
              "lessThan": "2.5.48",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "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 a CSS injection vulnerability in the remote event preview feature. When a user previews an event from a linked MISP server, the colour value associated with each remote tag is written directly into an inline CSS style attribute without sufficient validation. Although HTML entity encoding is applied, the value is interpreted as CSS within the style attribute, allowing a malicious or compromised linked server to inject arbitrary CSS declarations.\u003c/p\u003e\u003cp\u003eAn attacker with the ability to create or modify tags on a linked MISP instance can craft a tag colour value containing CSS injection payloads. When a user on the local instance views the event preview, the injected CSS is rendered, potentially allowing UI manipulation, visual spoofing, or limited information disclosure through CSS-based techniques.\u003c/p\u003e\u003cp\u003ePreconditions:\u003c/p\u003e\u003cp\u003e- A linked MISP server relationship exists between the victim instance and the attacker-controlled instance.\u003c/p\u003e\u003cp\u003e- The attacker can create or modify tags on the linked server.\u003c/p\u003e\u003cp\u003e- A victim user views the remote event preview page.\u003c/p\u003e\u003cp\u003eAffected: \u0026lt;2.5.48.\u003c/p\u003e"
            }
          ],
          "value": "MISP contains a CSS injection vulnerability in the remote event preview feature. When a user previews an event from a linked MISP server, the colour value associated with each remote tag is written directly into an inline CSS style attribute without sufficient validation. Although HTML entity encoding is applied, the value is interpreted as CSS within the style attribute, allowing a malicious or compromised linked server to inject arbitrary CSS declarations.\n\nAn attacker with the ability to create or modify tags on a linked MISP instance can craft a tag colour value containing CSS injection payloads. When a user on the local instance views the event preview, the injected CSS is rendered, potentially allowing UI manipulation, visual spoofing, or limited information disclosure through CSS-based techniques.\n\nPreconditions:\n\n- A linked MISP server relationship exists between the victim instance and the attacker-controlled instance.\n\n- The attacker can create or modify tags on the linked server.\n\n- A victim user views the remote event preview page.\n\nAffected: \u003c2.5.48."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-66",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-66 Leveraging Trusted Relationships"
            }
          ]
        }
      ],
      "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",
            "valueDensity": "NOT_DEFINED",
            "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        },
        {
          "format": "SSVC",
          "other": {
            "content": {
              "options": [
                {
                  "Exploitation": "none"
                },
                {
                  "Automatable": "yes"
                },
                {
                  "Technical Impact": "partial"
                }
              ],
              "role": "Supplier",
              "timestamp": "2026-10-19T09:01:35Z",
              "version": "2.0.3"
            },
            "type": "SSVC"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-74",
              "description": "CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:15:47.453Z",
        "orgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
        "shortName": "CIRCL"
      },
      "references": [
        {
          "name": "Security patch",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/MISP/MISP/commit/91323b517"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eThe fix introduces strict validation of the tag colour value before it is rendered into a CSS style attribute. Only values matching a valid six-digit hexadecimal colour pattern (e.g. #aabbcc) are accepted; any other value is replaced with a safe default (#ffffff). This prevents arbitrary CSS from being injected through the colour field, aligning the remote tag handling with the validation already applied to local tags.\u003c/p\u003e"
            }
          ],
          "value": "The fix introduces strict validation of the tag colour value before it is rendered into a CSS style attribute. Only values matching a valid six-digit hexadecimal colour pattern (e.g. #aabbcc) are accepted; any other value is replaced with a safe default (#ffffff). This prevents arbitrary CSS from being injected through the colour field, aligning the remote tag handling with the validation already applied to local tags."
        }
      ],
      "title": "MISP CSS Injection via Remote Tag Colour in Event Preview",
      "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 boundary is inferred from the tag_version_boundary metadata (v2.5.48, 27 commits after fix); the exact first affected version is not stated in the patch.",
                  "PR:L assumes that creating or modifying a tag on a linked MISP server requires only low-level user privileges; the exact permission model was not verified from the patch.",
                  "SC:L assumes CSS injection could enable limited client-side information disclosure (e.g., via CSS selectors or layout manipulation); full XSS or data exfiltration is not evidenced.",
                  "CAPEC-66 is the closest available mapping; no CAPEC specifically models CSS injection via trusted inter-instance data, so this mapping carries uncertainty.",
                  "The commit message states the issue was found during internal review and not externally reported; no external finder or reporter is credited.",
                  "The Co-Authored-By line references an AI tool (Claude Opus 5.5); it is credited as a tool rather than a human remediation developer."
                ],
                "capecRationale": [
                  {
                    "capecId": "CAPEC-66",
                    "rationale": "The attack exploits the inherent trust between linked MISP instances. The local instance accepts and renders data (tag colours) from a remote linked server without sufficient validation, assuming the data is well-formed. The attacker leverages this trusted relationship to inject CSS. This is the closest CAPEC; no CAPEC specifically models CSS injection via trusted data sources, so CAPEC-66 is the best available match."
                  }
                ],
                "commit": "91323b517bb5a34f413363faf8703a3c0a1a9904",
                "confidence": "medium",
                "credits": [
                  {
                    "lang": "en",
                    "type": "remediation developer",
                    "value": "iglocska"
                  },
                  {
                    "lang": "en",
                    "type": "remediation developer",
                    "value": "Claude Opus 5.5 (1M context)"
                  }
                ],
                "cvssRationale": "AV:N \u2013 the attack originates from a remote linked MISP server over the network. AC:L \u2013 no race conditions or special timing; simply setting a tag colour suffices. AT:N \u2013 no manipulation of the attack target is required. PR:L \u2013 the attacker needs low-privilege access (tag creation) on the linked server. UI:A \u2013 the victim must actively navigate to the event preview page. VC:N \u2013 no direct confidentiality loss on the vulnerable system. VI:N \u2013 no integrity impact on the vulnerable system\u0027s data. VA:N \u2013 no availability impact. SC:L \u2013 CSS injection may allow limited information disclosure on the client (e.g., reading page structure via CSS selectors or side channels). SI:L \u2013 the attacker can modify the visual presentation of the preview page (UI manipulation, overlay, spoofing). SA:N \u2013 no security authority impact.",
                "fixSummary": "The fix introduces strict validation of the tag colour value before it is rendered into a CSS style attribute. Only values matching a valid six-digit hexadecimal colour pattern (e.g. #aabbcc) are accepted; any other value is replaced with a safe default (#ffffff). This prevents arbitrary CSS from being injected through the colour field, aligning the remote tag handling with the validation already applied to local tags.",
                "generatedAt": "2026-10-19T09:01:35.918427Z",
                "generator": "patch2vuln.py",
                "model": "qwen3.8:27b",
                "modelComparison": {
                  "rankings": [
                    {
                      "agreementScore": 11,
                      "assumptionCount": 6,
                      "confidence": "medium",
                      "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": "8be436940ffd0e21b7145fcb604ebfb0b529f6bbac717ee5cdf38c2e0dc2904e",
                "patchSummary": "In app/View/Servers/preview_event.ctp, a regex check (preg_match against /^#[0-9a-f]{6}$/i) is added before the tag colour is used. If the colour does not match the hex pattern, it defaults to #ffffff. The validated $colour variable replaces the raw $tag[\u0027colour\u0027] in both the background-color style property and the getTextColour() call, eliminating the untrusted value from the CSS context.",
                "patchTruncated": false,
                "patches": [
                  {
                    "commit": "91323b517bb5a34f413363faf8703a3c0a1a9904",
                    "date": "Thu, 24 Sep 2026 23:54:30 +0200",
                    "patchSha256": "8be436940ffd0e21b7145fcb604ebfb0b529f6bbac717ee5cdf38c2e0dc2904e",
                    "source": "https://github.com/MISP/MISP/commit/91323b517.patch",
                    "sourceUrl": "https://github.com/MISP/MISP/commit/91323b517.patch",
                    "subject": "fix: [sync] Only use a valid colour for remote tags in the"
                  }
                ],
                "source": "https://github.com/MISP/MISP/commit/91323b517.patch",
                "ssvc": {
                  "options": [
                    {
                      "Exploitation": "none"
                    },
                    {
                      "Automatable": "yes"
                    },
                    {
                      "Technical Impact": "partial"
                    }
                  ],
                  "role": "Supplier",
                  "timestamp": "2026-10-19T09:01:35Z",
                  "version": "2.0.3"
                },
                "subject": "fix: [sync] Only use a valid colour for remote tags in the",
                "tagVersionBoundary": {
                  "commits_after_fix": 27,
                  "repository": "https://github.com/MISP/MISP",
                  "tag": "v2.5.48",
                  "version": "2.5.48",
                  "version_type": "semver"
                },
                "weaknessRationale": [
                  {
                    "cweId": "CWE-74",
                    "rationale": "The tag colour value is not neutralized for the CSS context in which it is placed. HTML entity encoding (h()) does not sanitize CSS metacharacters such as semicolons, colons, or function calls, allowing CSS injection. CWE-74 is the most precise parent weakness covering injection into a downstream component (CSS) without a more specific child CWE for CSS injection."
                  }
                ]
              }
            },
            "bcp-05-x-03": {
              "x_timeline": {
                "events": [
                  {
                    "description": "Corrective change authored (91323b517bb5a34f413363faf8703a3c0a1a9904): fix: [sync] Only use a valid colour for remote tags in the",
                    "id": "evt-fix-developed-1",
                    "references": [
                      "https://github.com/MISP/MISP/commit/91323b517.patch"
                    ],
                    "timestamp": "2026-09-24T21:54:30Z",
                    "type": "fix-developed"
                  }
                ]
              }
            }
          },
          "recordType": "advisory",
          "vulnId": "GCVE-1-2026-20339"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
    "assignerShortName": "CIRCL",
    "cveId": "CVE-2026-112183",
    "datePublished": "2026-10-19T09:15:47.453Z",
    "dateReserved": "2026-10-19T09:15:45.556Z",
    "dateUpdated": "2026-10-19T17:15:45.687Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted