CVE-2026-53786
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.
- Score
- CVSS 4.0 6.9 Medium
- Status
- Analyzed - disclosure@vulncheck.com
- Published
- 2026-08-13
- Last modified
- 2026-10-24
- Weaknesses
- CWE-863
Affected products
References
- https://github.com/RsyncProject/rsync/security/advisories/GHSA-mrc3-6cwx-hch6
- https://github.com/RsyncProject/rsync/releases/tag/v3.5.0
- https://www.vulncheck.com/advisories/rsync-filter-rule-bypass-via-filter-merge-directive
