CVE-2026-52811

Gravedad CVSS v4.0:

CRÍTICA

Tipo:

CWE-22 Limitación incorrecta de nombre de ruta a un directorio restringido (Path Traversal)

Fecha de publicación:

24/06/2026

Última modificación:

26/06/2026

Descripción

*** Pendiente de traducción *** Gogs is an open source self-hosted Git service. Prior to 0.14.3, (*Repository).UploadRepoFiles checks for symlinks only on the leaf of the upload target (osx.IsSymlink(targetPath)). The siblings UpdateRepoFile, DeleteRepoFile, and GetDiffPreview use hasSymlinkInPath, which lstats every component — UploadRepoFiles is the lone outlier. An attacker with repo-write access plus a multipart upload whose filename contains a literal backslash (preserved by filepath.Base on Linux, then converted to / by pathx.Clean) redirects the write through a previously-committed directory symlink. iox.CopyFile opens the destination with os.Create (no O_NOFOLLOW), so the kernel follows the parent symlink and writes attacker bytes anywhere the gogs UID can write — ~git/.ssh/authorized_keys → SSH foothold, or .git/hooks/post-receive → next-push RCE. This vulnerability is fixed in 0.14.3.

Impacto

Vector 4.0

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H CVSS v4.0 Severidad y Métricas:

Puntuación base: 9.00 CRÍTICA
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Vector de acceso (AV): A través de red
Complejidad de acceso (AC): Bajo
Attack Requirements (AT): Present
Privilegios Requeridos (PR): Bajo
Interacción del usuario (UI): Ninguno
Confidentiality (VC): Alto
Integrity (VI): Alto
Availability (VA): Alto
Confidentiality (SC): Alto
Integrity (SI): Alto
Availability (SA): Alto

Puntuación base 4.0

9.00

Gravedad 4.0

CRÍTICA

CVE-2026-52811

Descripción

Impacto

Referencias a soluciones, herramientas e información