CVE-2026-0573

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The repository_pages API insecurely followed HTTP redirects when fetching artifact URLs, preserving the authorization header containing a privileged JWT. An authenticated user could redirect these requests to an attacker-controlled domain, exfiltrate the Actions.ManageOrgs JWT, and leverage it for potential remote code execution. Attackers would require access to the target GitHub Enterprise Server instance and the ability to exploit a legacy redirect to an attacker-controlled domain. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.19 and was fixed in versions 3.19.2, 3.18.4, 3.17.10, 3.16.13, 3.15.17, and 3.14.22. This vulnerability was reported via the GitHub Bug Bounty program."}, {"lang": "es", "value": "Una vulnerabilidad de redirecci\u00f3n de URL fue identificada en GitHub Enterprise Server la cual permit\u00eda a las redirecciones controladas por el atacante filtrar tokens de autorizaci\u00f3n sensibles. La API repository_pages segu\u00eda de forma insegura las redirecciones HTTP al obtener URLs de artefactos, preservando el encabezado de autorizaci\u00f3n que conten\u00eda un JWT privilegiado. Un usuario autenticado pod\u00eda redirigir estas solicitudes a un dominio controlado por el atacante, exfiltrar el JWT de Actions.ManageOrgs y aprovecharlo para una posible ejecuci\u00f3n remota de c\u00f3digo. Los atacantes requerir\u00edan acceso a la instancia de GitHub Enterprise Server objetivo y, tambi\u00e9n, la capacidad de explotar una redirecci\u00f3n heredada a un dominio controlado por el atacante. Esta vulnerabilidad afect\u00f3 a todas las versiones de GitHub Enterprise Server anteriores a la 3.19 y fue corregida en las versiones 3.19.2, 3.18.4, 3.17.10, 3.16.13, 3.15.17 y 3.14.22. Esta vulnerabilidad fue reportada a trav\u00e9s del programa GitHub Bug Bounty."}], "lastModified": "2026-02-19T22:49:21.843", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5B364775-45E7-4E82-8C8D-DBCD513523C3", "versionEndExcluding": "3.14.22"}, {"criteria": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "44763502-3158-4369-9EBB-8D87C16645FC", "versionEndExcluding": "3.15.17", "versionStartIncluding": "3.15.0"}, {"criteria": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C3E68ACE-C628-4029-B7B4-1E08D502A24D", "versionEndExcluding": "3.16.13", "versionStartIncluding": "3.16.0"}, {"criteria": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "062A4133-114C-4643-BB73-1C37C0C188C6", "versionEndExcluding": "3.17.10", "versionStartIncluding": "3.17.0"}, {"criteria": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "51E739B5-F9CF-4D7E-8240-FEE7E3D9F1A2", "versionEndExcluding": "3.18.4", "versionStartIncluding": "3.18.0"}, {"criteria": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D8AE9F21-7596-446E-99B8-F09A230F173A", "versionEndExcluding": "3.19.2", "versionStartIncluding": "3.19.0"}], "operator": "OR"}]}], "sourceIdentifier": "product-cna@github.com"}