CVE-2026-53798rsync < 3.5.0 Privilege Confusion via name-converter uid/gid mapping
Updated under an hour ago ()
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It affects RsyncProject rsync and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- Weakness (CWE)
- CWE-704
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Analyzed
- Record last updated
- Aug 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
RsyncProject rsync rsyncproject:rsync (from the name) | through 3.4.4; 3.5.0 not affected | CNA record |
samba rsync samba:rsync | before 3.5.0 | NVD |
References
- https://github.com/RsyncProject/rsync/security/advisories/GHSA-hx7p-3gvv-pqgvvendor-advisory
- https://github.com/RsyncProject/rsync/releases/tag/v3.5.0release-notes, product
- https://www.vulncheck.com/advisories/rsync-privilege-confusion-via-name-converter-uid-gid-mappingthird-party-advisory, release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.