Vulnerability record · CVE-2026-53798 · published 13 August 2026

CVE-2026-53798: Samba rsync vulnerability

Samba · Rsync

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.

6.9 CVSS 4.0 Medium EPSS 0.43% · top 65.4% CWE-704 · CWE-704

6.9CVSS 4.0 base score

0.43%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

3References

31 Aug 2026Last modified by NVD

Description

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Rsync Samba

References

Link	Tags
https://github.com/RsyncProject/rsync/releases/tag/v3.5.0	ProductRelease 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 NotesThird Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-53798), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.