Vulnerability Description
rsync before 3.5.0 contains a filter rule bypass vulnerability that allows authenticated clients to override module-level filter restrictions by supplying malicious --filter merge file directives. Attackers can inject client-side merge file directives during filter evaluation to introduce rules that supersede daemon module-level restrictions, gaining access to files the module filter was intended to exclude.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Samba | Rsync | < 3.5.0 |
Related Weaknesses (CWE)
References
- https://github.com/RsyncProject/rsync/releases/tag/v3.5.0ProductRelease Notes
- https://github.com/RsyncProject/rsync/security/advisories/GHSA-mrc3-6cwx-hch6Vendor Advisory
- https://www.vulncheck.com/advisories/rsync-filter-rule-bypass-via-filter-merge-dRelease NotesThird Party Advisory
FAQ
What is CVE-2026-53786?
CVE-2026-53786 is a vulnerability with a CVSS score of 6.5 (MEDIUM). rsync before 3.5.0 contains a filter rule bypass vulnerability that allows authenticated clients to override module-level filter restrictions by supplying malicious --filter merge file directives. Att...
How severe is CVE-2026-53786?
CVE-2026-53786 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-53786?
Check the references section above for vendor advisories and patch information. Affected products include: Samba Rsync.