CVE-2026-1355

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By supplying the migration identifier, an attacker could overwrite or replace a victim\u2019s migration archive, potentially causing victims to download attacker-controlled repository data during migration restores or automated imports. An attacker would require authentication to the victim's GitHub Enterprise Server instance. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.20 and was fixed in versions 3.19.2, 3.18.5, 3.17.11, 3.16.14, 3.15.18, 3.14.23. This vulnerability was reported via the GitHub Bug Bounty program."}, {"lang": "es", "value": "Se encontr\u00f3 una vulnerabilidad de falta de autorizaci\u00f3n en GitHub Enterprise Server que permit\u00eda a un atacante cargar contenido no autorizado a la exportaci\u00f3n de migraci\u00f3n de repositorio de otro usuario debido a una falta de verificaci\u00f3n de autorizaci\u00f3n en el endpoint de carga de migraci\u00f3n de repositorio. Al proporcionar el identificador de migraci\u00f3n, un atacante podr\u00eda sobrescribir o reemplazar el archivo de migraci\u00f3n de una v\u00edctima, lo que podr\u00eda hacer que las v\u00edctimas descargaran datos de repositorio controlados por el atacante durante las restauraciones de migraci\u00f3n o importaciones automatizadas. Un atacante requerir\u00eda autenticaci\u00f3n a la instancia de GitHub Enterprise Server de la v\u00edctima. Esta vulnerabilidad afect\u00f3 a todas las versiones de GitHub Enterprise Server anteriores a la 3.20 y fue corregida en las versiones 3.19.2, 3.18.5, 3.17.11, 3.16.14, 3.15.18, 3.14.23. Esta vulnerabilidad fue reportada a trav\u00e9s del programa GitHub Bug Bounty."}], "lastModified": "2026-02-19T22:08:57.277", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BEA55C32-050E-43E6-A333-DAB8081BEA39", "versionEndExcluding": "3.14.23"}, {"criteria": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "ED4B65C8-B789-4241-B6A8-7DEA48362FE5", "versionEndExcluding": "3.15.18", "versionStartIncluding": "3.15.0"}, {"criteria": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "46E1F973-5D32-4EB4-ABF0-758153BE97BD", "versionEndExcluding": "3.16.14", "versionStartIncluding": "3.16.0"}, {"criteria": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "90147B72-EECF-4EB8-82D2-A3F98D0223A9", "versionEndExcluding": "3.17.11", "versionStartIncluding": "3.17.0"}, {"criteria": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B7172422-332C-4454-85A3-551BBAC1A59C", "versionEndExcluding": "3.18.5", "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"}