Vulnerability-Lookup

GHSA-P286-R3VC-Q86Q

Vulnerability from github – Published: 2026-09-06 15:31 – Updated: 2026-09-07 09:31

Details

MISP's UiBeta theme collection view (app/View/Themed/UiBeta/Collections/view.ctp) performed a secondary query of member events by UUID without applying the caller's access control list (ACL). The CollectionsController::view() action correctly resolved collection element UUIDs through Event::fetchSimpleEvents($user, ...), which enforces per-user event ACL. However, the view template independently re-queried the same UUIDs using only an Event.uuid IN (...) condition, omitting the createEventConditions() authorization filter. Because collection element UUIDs are stored without server-side authorization against the referenced event (CollectionElementsController::add() accepts whatever UUID the collection owner posts), an authenticated user with view access to a collection could retrieve full details of events they are not permitted to read. The exposed data included event identifiers, info, dates, timestamps, creator organization, all event tags, and galaxy clusters (the latter attached via a cluster-scoped rather than event-scoped ACL check). This constitutes an authorization bypass at the presentation layer, allowing horizontal privilege escalation across event boundaries within the MISP instance.

Severity

7.1 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

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{
  "affected": [],
  "aliases": [
    "CVE-2026-86283"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-285"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-06T15:17:24Z",
    "severity": "HIGH"
  },
  "details": "MISP\u0027s UiBeta theme collection view (app/View/Themed/UiBeta/Collections/view.ctp) performed a secondary query of member events by UUID without applying the caller\u0027s access control list (ACL). The CollectionsController::view() action correctly resolved collection element UUIDs through Event::fetchSimpleEvents($user, ...), which enforces per-user event ACL. However, the view template independently re-queried the same UUIDs using only an Event.uuid IN (...) condition, omitting the createEventConditions() authorization filter. Because collection element UUIDs are stored without server-side authorization against the referenced event (CollectionElementsController::add() accepts whatever UUID the collection owner posts), an authenticated user with view access to a collection could retrieve full details of events they are not permitted to read. The exposed data included event identifiers, info, dates, timestamps, creator organization, all event tags, and galaxy clusters (the latter attached via a cluster-scoped rather than event-scoped ACL check). This constitutes an authorization bypass at the presentation layer, allowing horizontal privilege escalation across event boundaries within the MISP instance.",
  "id": "GHSA-p286-r3vc-q86q",
  "modified": "2026-09-07T09:31:38Z",
  "published": "2026-09-06T15:31:07Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-86283"
    },
    {
      "type": "WEB",
      "url": "https://github.com/MISP/MISP/commit/44573e4a8"
    },
    {
      "type": "WEB",
      "url": "https://github.com/MISP/MISP/commit/44573e4a8.patch"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-86283 (GCVE-0-2026-86283)

Vulnerability from cvelistv5 – Published: 2026-09-06 14:15 – Updated: 2026-09-08 18:18

Title

MISP UiBeta Collection View Bypasses Event ACL, Exposing Unauthorized Event Data

Summary

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-08 18:18 UTC

CWE

CWE-862 - Missing Authorization
CWE-285 - Improper Authorization

Assigner

CIRCL ENISA root

References

1 reference

URL	Tags
https://github.com/MISP/MISP/commit/44573e4a8	patch

Impacted products

1 product

Vendor	Product	Version
MISP	MISP	Affected: 0 , ≤ 2.5.45 (semver)

Credits

Scottish Government - National Cyber Team iglocska Claude Opus 5 (1M context)

GCVE extensions

AI-generated Not human-reviewed Model qwen3.8:27b advisory bcp-05-x-01

AI involvement GCVE-BCP-05-X-01

Whole record AI-generated Not 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`

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-86283",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-08T18:18:11.942447Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-08T18:18:22.932Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "modules": [
            "UiBeta Collections view"
          ],
          "product": "MISP",
          "programFiles": [
            "app/View/Themed/UiBeta/Collections/view.ctp"
          ],
          "repo": "https://github.com/MISP/MISP",
          "vendor": "MISP",
          "versions": [
            {
              "lessThanOrEqual": "2.5.45",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Scottish Government - National Cyber Team"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "iglocska"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Claude Opus 5 (1M context)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eMISP\u0027s UiBeta theme collection view (app/View/Themed/UiBeta/Collections/view.ctp) performed a secondary query of member events by UUID without applying the caller\u0027s access control list (ACL). The CollectionsController::view() action correctly resolved collection element UUIDs through Event::fetchSimpleEvents($user, ...), which enforces per-user event ACL. However, the view template independently re-queried the same UUIDs using only an Event.uuid IN (...) condition, omitting the createEventConditions() authorization filter. Because collection element UUIDs are stored without server-side authorization against the referenced event (CollectionElementsController::add() accepts whatever UUID the collection owner posts), an authenticated user with view access to a collection could retrieve full details of events they are not permitted to read. The exposed data included event identifiers, info, dates, timestamps, creator organization, all event tags, and galaxy clusters (the latter attached via a cluster-scoped rather than event-scoped ACL check). This constitutes an authorization bypass at the presentation layer, allowing horizontal privilege escalation across event boundaries within the MISP instance.\u003c/p\u003e"
            }
          ],
          "value": "MISP\u0027s UiBeta theme collection view (app/View/Themed/UiBeta/Collections/view.ctp) performed a secondary query of member events by UUID without applying the caller\u0027s access control list (ACL). The CollectionsController::view() action correctly resolved collection element UUIDs through Event::fetchSimpleEvents($user, ...), which enforces per-user event ACL. However, the view template independently re-queried the same UUIDs using only an Event.uuid IN (...) condition, omitting the createEventConditions() authorization filter. Because collection element UUIDs are stored without server-side authorization against the referenced event (CollectionElementsController::add() accepts whatever UUID the collection owner posts), an authenticated user with view access to a collection could retrieve full details of events they are not permitted to read. The exposed data included event identifiers, info, dates, timestamps, creator organization, all event tags, and galaxy clusters (the latter attached via a cluster-scoped rather than event-scoped ACL check). This constitutes an authorization bypass at the presentation layer, allowing horizontal privilege escalation across event boundaries within the MISP instance."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-1",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "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:H/VI:N/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-862",
              "description": "CWE-862 Missing Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-285",
              "description": "CWE-285 Improper Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-07T09:04:40.182Z",
        "orgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
        "shortName": "CIRCL"
      },
      "references": [
        {
          "name": "Security patch",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/MISP/MISP/commit/44573e4a8"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eThe view template now retrieves the authenticated user object and applies Event::createEventConditions($me) to the secondary event query, ensuring the same per-user ACL that the controller enforces is also applied at the view layer. The galaxy cluster attachment call was also updated to use the same authenticated user reference, closing the cluster-scoped ACL gap.\u003c/p\u003e"
            }
          ],
          "value": "The view template now retrieves the authenticated user object and applies Event::createEventConditions($me) to the secondary event query, ensuring the same per-user ACL that the controller enforces is also applied at the view layer. The galaxy cluster attachment call was also updated to use the same authenticated user reference, closing the cluster-scoped ACL gap."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "MISP UiBeta Collection View Bypasses Event ACL, Exposing Unauthorized Event Data",
      "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": "none",
                  "scope": "record",
                  "tags": [
                    "ai-computer-assisted:llm-generated",
                    "ai-computer-assisted:classification"
                  ]
                }
              ]
            }
          },
          "recordType": "advisory",
          "vulnId": "gcve-1-2026-20028"
        }
      ],
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      },
      "x_patch2vuln": {
        "assumptions": [
          "The MISP instance is assumed to be deployed over a network (web application) with multiple users of varying privilege levels.",
          "The UiBeta theme is assumed to be active or selectable by the affected user; if the theme is not in use, the vulnerability is not reachable.",
          "The attacker is assumed to have at least read access to a collection that contains elements referencing events outside their ACL.",
          "No specific MISP version range is identified in the patch; the affected version is marked as unspecified.",
          "The CVSS assumes the exposed event data constitutes a high confidentiality impact; if the deployment only contains low-sensitivity data, the impact rating would be lower."
        ],
        "commit": "44573e4a8e9dff43815f83a91a9c8b9f0f790261",
        "confidence": "high",
        "credits": [
          {
            "lang": "en",
            "type": "reporter",
            "value": "Scottish Government - National Cyber Team"
          },
          {
            "lang": "en",
            "type": "remediation developer",
            "value": "iglocska"
          },
          {
            "lang": "en",
            "type": "remediation developer",
            "value": "Claude Opus 5 (1M context)"
          }
        ],
        "cvssRationale": "The vulnerability is exploitable over the network (AV:N) via the MISP web interface. Attack complexity is low (AC:L) because the attacker only needs to view a collection whose elements reference events outside their ACL; no race conditions or special timing are required. No attack target manipulation is needed (AT:N). The attacker must be an authenticated MISP user with at least view access to a collection (PR:L). No user interaction is required beyond normal browsing (UI:N). The impact is high on the confidentiality of the vulnerable component (VC:H) because full event metadata, tags, and galaxy cluster data are exposed to unauthorized users. There is no integrity or availability impact on the vulnerable component (VI:N, VA:N) and no impact on external components (SC:N, SI:N, SA:N) since the exposed data resides within the same MISP instance.",
        "draft": true,
        "fixSummary": "The view template now retrieves the authenticated user object and applies Event::createEventConditions($me) to the secondary event query, ensuring the same per-user ACL that the controller enforces is also applied at the view layer. The galaxy cluster attachment call was also updated to use the same authenticated user reference, closing the cluster-scoped ACL gap.",
        "generatedAt": "2026-09-06T13:42:10.775993Z",
        "generator": "patch2vuln.py",
        "model": "qwen3.8:27b",
        "patchSha256": "3d73a5a5268dbae77114b00d96440a3b5b164e76dbc349cdf8c915ff8f18f72b",
        "patchSummary": "In app/View/Themed/UiBeta/Collections/view.ctp, the patch adds retrieval of the authenticated user via $this-\u003eget(\u0027me\u0027), builds an ACL condition array using $_eventModel-\u003ecreateEventConditions($_me), appends the Event.uuid IN clause to that condition array, and passes the combined conditions to the Event::find() call. The attachClustersToEventIndex() call was changed from $this-\u003eSession-\u003eread(\u0027Auth.User\u0027) to the same $_me variable for consistency. A guard clause (!empty($_me)) was added to prevent unauthenticated execution of the query.",
        "patchTruncated": false,
        "source": "https://github.com/MISP/MISP/commit/44573e4a8.patch",
        "subject": "fix: [security] Apply the caller\u0027s ACL to the beta collection",
        "weaknessRationale": [
          {
            "cweId": "CWE-862",
            "rationale": "The view-layer query for events by UUID omitted the authorization check (createEventConditions) that the controller layer applied, resulting in a missing authorization enforcement at the point where data was retrieved for display."
          },
          {
            "cweId": "CWE-285",
            "rationale": "The galaxy cluster attachment used a cluster-scoped ACL rather than the event-scoped ACL, and the overall view-layer authorization was weaker than the controller-layer authorization, constituting improper authorization enforcement."
          }
        ]
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
    "assignerShortName": "CIRCL",
    "cveId": "CVE-2026-86283",
    "datePublished": "2026-09-06T14:15:06.533Z",
    "dateReserved": "2026-09-06T14:14:57.833Z",
    "dateUpdated": "2026-09-08T18:18:22.932Z",
    "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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

GHSA-P286-R3VC-Q86Q

CVE-2026-86283 (GCVE-0-2026-86283)

Tags

Sightings

Nomenclature