CVE-2026-15996
Full vulnerability record from the local CVENow database.
Description
A denial of service vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated attacker to cause excessive CPU consumption and exhaust the pool of request-handling worker processes by sending a crafted form-encoded HTTP POST request containing deeply nested parameters. Because request parameters were parsed before routing and authentication, any POST endpoint could be used to trigger the condition, which could render the instance unresponsive. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.20.3, 3.19.7, 3.18.10, and 3.17.16.
Severity
MEDIUM
CVSS score
6.6
(v4.0)
Vulnerability status
Analyzed
Source identifier
Published
2026-08-05 21:16:57.250000
Last modified
2026-10-23 21:10:00.157000
View original CVE JSON
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"sourceIdentifier": "[email protected]",
"published": "2026-08-05T21:16:57.250",
"lastModified": "2026-10-23T21:10:00.157",
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"value": "Una vulnerabilidad de denegación de servicio fue identificada en GitHub Enterprise Server que permitía a un atacante no autenticado causar un consumo excesivo de CPU y agotar el grupo de procesos de trabajo que manejan las solicitudes enviando una solicitud HTTP POST codificada en formulario manipulada que contenía parámetros profundamente anidados. Debido a que los parámetros de la solicitud se analizaban antes del enrutamiento y la autenticación, cualquier endpoint POST podía usarse para desencadenar la condición, lo que podía dejar la instancia sin respuesta. Esta vulnerabilidad afectaba a todas las versiones de GitHub Enterprise Server anteriores a la 3.21 y fue corregida en las versiones 3.20.3, 3.19.7, 3.18.10 y 3.17.16."
}
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