CVE-2026-53796

rsync before 3.5.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability in the non-daemon receiver's destination directory handling that allows an attacker who can manipulate destination path parent components to redirect file writes to unintended locations. Attackers can substitute a symlink for a component of the destination path between the path resolution and chdir() call, causing the receiver's working directory to be established outside the intended destination tree so that subsequent relative-path file writes land in unintended filesystem locations.

CVSS v3 6.3 MEDIUM

6.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.0 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/RsyncProject/rsync/releases/tag/v3.5.0
https://github.com/RsyncProject/rsync/security/advisories/GHSA-w75h-ccff-w53m
https://www.vulncheck.com/advisories/rsync-toctou-race-condition-via-destination-directory-handling

Configurations

No configuration.

History

23 Oct 2026, 18:10

Type	Values Removed	Values Added
Summary		(es) rsync anterior a 3.5.0 contiene una vulnerabilidad de condición de carrera de tiempo de verificación a tiempo de uso (TOCTOU) en el manejo del directorio de destino del receptor no demonio que permite a un atacante que puede manipular los componentes padre de la ruta de destino redirigir las escrituras de archivos a ubicaciones no deseadas. Los atacantes pueden sustituir un enlace simbólico por un componente de la ruta de destino entre la resolución de la ruta y la llamada a chdir(), haciendo que el directorio de trabajo del receptor se establezca fuera del árbol de destino previsto, de modo que las escrituras de archivos de ruta relativa posteriores aterricen en ubicaciones no deseadas del sistema de archivos.

Information

Published : 2026-08-13 15:19

Updated : 2026-10-24 16:10

NVD link : CVE-2026-53796

Mitre link : CVE-2026-53796

CVE.ORG link : CVE-2026-53796

JSON object : View

Products Affected

No product.

CWE

CWE-59

Improper Link Resolution Before File Access ('Link Following')

CWE-367

Time-of-check Time-of-use (TOCTOU) Race Condition

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