CVE-2026-26207

{"id": "CVE-2026-26207", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 2.5, "exploitabilityScore": 2.8}]}, "published": "2026-02-26T16:24:07.163", "references": [{"url": "https://github.com/discourse/discourse/security/advisories/GHSA-jr4h-w6p5-w55r", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-862"}]}], "descriptions": [{"lang": "en", "value": "Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, `discourse-policy` plugin allows any authenticated user to interact with policies on posts they do not have permission to view. The `PolicyController` loads posts by ID without verifying the current user's access, enabling policy group members to accept/unaccept policies on posts in private categories or PMs they cannot see and any authenticated user to enumerate which post IDs have policies attached via differentiated error responses (information disclosure). The issue is patched in versions 2025.12.2, 2026.1.1, and 2026.2.0 by adding a `guardian.can_see?(@post)` check in the `set_post` before_action, ensuring post visibility is verified before any policy action is processed. As a workaround, disabling the discourse-policy plugin (`policy_enabled = false`) eliminates the vulnerability. There is no other workaround without upgrading."}, {"lang": "es", "value": "Discourse es una plataforma de discusi\u00f3n de c\u00f3digo abierto. Antes de las versiones 2025.12.2, 2026.1.1 y 2026.2.0, el plugin 'discourse-policy' permite a cualquier usuario autenticado interactuar con pol\u00edticas en publicaciones que no tienen permiso para ver. El 'PolicyController' carga publicaciones por ID sin verificar el acceso del usuario actual, permitiendo a los miembros del grupo de pol\u00edticas aceptar/rechazar pol\u00edticas en publicaciones en categor\u00edas privadas o mensajes privados (PMs) que no pueden ver y a cualquier usuario autenticado enumerar qu\u00e9 IDs de publicaciones tienen pol\u00edticas adjuntas a trav\u00e9s de respuestas de error diferenciadas (revelaci\u00f3n de informaci\u00f3n). El problema se ha parcheado en las versiones 2025.12.2, 2026.1.1 y 2026.2.0 al a\u00f1adir una verificaci\u00f3n 'guardian.can_see?(@post)' en la acci\u00f3n previa 'set_post', asegurando que la visibilidad de la publicaci\u00f3n se verifica antes de que se procese cualquier acci\u00f3n de pol\u00edtica. Como soluci\u00f3n alternativa, deshabilitar el plugin discourse-policy ('policy_enabled = false') elimina la vulnerabilidad. No hay otra soluci\u00f3n alternativa sin actualizar."}], "lastModified": "2026-03-02T21:51:04.787", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6DB837D7-28C8-4E0F-B55F-AAAA36F32035", "versionEndExcluding": "2025.12.0"}, {"criteria": "cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1CAFCC9D-53D7-4017-85A5-EE6CA5A6A11C", "versionEndExcluding": "2026.1.1", "versionStartIncluding": "2026.1.0"}, {"criteria": "cpe:2.3:a:discourse:discourse:2026.2.0:*:*:*:latest:*:*:*", "vulnerable": true, "matchCriteriaId": "BB002FDC-BC71-4C46-8AAF-A34EC717E0E7"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}