CVE-2026-53798

rsync before 3.5.0 contains a privilege confusion vulnerability in the name-converter subprocess uid/gid mapping that allows local attackers to cause transferred files to be owned by root by influencing name-converter responses to return empty values. When the name-converter subprocess returns an empty response for a uid or gid lookup, rsync incorrectly interprets it as a successful resolution to uid/gid 0 (root) rather than a lookup failure, and if the name-converter also signals fake super-user status, rsync proceeds with root ownership assignments for transferred files.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/RsyncProject/rsync/releases/tag/v3.5.0	Product Release Notes
https://github.com/RsyncProject/rsync/security/advisories/GHSA-hx7p-3gvv-pqgv	Vendor Advisory
https://www.vulncheck.com/advisories/rsync-privilege-confusion-via-name-converter-uid-gid-mapping	Release Notes Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:*

History

23 Oct 2026, 18:10

Type	Values Removed	Values Added
Summary		(es) rsync anterior a la versión 3.5.0 contiene una vulnerabilidad de confusión de privilegios en el mapeo de uid/gid del subproceso name-converter que permite a atacantes locales hacer que los archivos transferidos sean propiedad de root al influir en las respuestas del name-converter para que devuelvan valores vacíos. Cuando el subproceso name-converter devuelve una respuesta vacía para una búsqueda de uid o gid, rsync lo interpreta incorrectamente como una resolución exitosa a uid/gid 0 (root) en lugar de un fallo de búsqueda, y si el name-converter también señala un estado de superusuario falso, rsync procede con asignaciones de propiedad de root para los archivos transferidos.

Information

Published : 2026-08-13 15:19

Updated : 2026-10-24 16:10

NVD link : CVE-2026-53798

Mitre link : CVE-2026-53798

CVE.ORG link : CVE-2026-53798

JSON object : View

Products Affected

samba

rsync

CWE

CWE-704

Incorrect Type Conversion or Cast

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