CVE-2026-53793
9.1
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Summary
rsync before 3.5.0 contains a path confinement bypass vulnerability that allows remote clients to escape the intended inner-module root confinement by constructing paths that resolve outside the chroot boundary when the module root contains a /./ boundary marker. Attackers can exploit improper handling of the /./ notation or forge delta-basis transfers referencing xname paths that cross the /./ boundary to gain unauthorized read or write access to files outside the module's subtree.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| RsyncProject | rsync | 0 <= 3.4.4 | affected |
| RsyncProject | rsync | 3.5.0 | unaffected |
Weaknesses
- CWE-59: CWE-59 Improper Link Resolution Before File Access ('Link Following')
References
- https://github.com/RsyncProject/rsync/security/advisories/GHSA-wj7w-vh23-mm44
- https://github.com/RsyncProject/rsync/releases/tag/v3.5.0
- https://www.vulncheck.com/advisories/rsync-path-confinement-bypass-via-boundary-marker-in-chroot-mode
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