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CVE-2026-53798 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:5.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/RsyncProject/rsync/releases/tag/v3.5.0	[email protected]	ProductRelease Notes
https://github.com/RsyncProject/rsync/security/advisories/GHSA-hx7p-3gvv-pqgv	[email protected]	Vendor Advisory
https://www.vulncheck.com/advisories/rsync-privilege-confusion-via-name-converter-uid-gid-mapping	[email protected]	Release NotesThird Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-704	Incorrect Type Conversion or Cast	[email protected]

Affected Products

Product	Versions
samba rsync	< 3.5.0
CPE cpe:2.3:a:samba:rsync:::::::: Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Aug 31, 2026	Initial Analysis	[email protected]
Aug 14, 2026	CVE Modified	[email protected]
Aug 13, 2026	CVE Modified	CISA-ADP
Aug 13, 2026	New CVE Received	[email protected]