CVE-2026-53784

Description

rsync before 3.5.0 contains a path traversal vulnerability that allows remote clients to access files outside the intended module root when use chroot is disabled and the module root path or a component of it is a symlink. The daemon calls chdir() to the module root at session initialization without resolving symlinks via realpath() or equivalent, causing subsequent relative-path operations to reference files relative to the symlink target rather than the intended module root, enabling unauthorized file access.

CVSS breakdown

Affected products

• RsyncProject / rsync0 – 3.4.4
• RsyncProject / rsync3.5.0 – 3.5.0

References

• VENDOR_ADVISORYhttps://github.com/RsyncProject/rsync/security/advisories/GHSA-ffg2-fr5g-3rxw
• PATCHhttps://github.com/RsyncProject/rsync/releases/tag/v3.5.0
• VENDOR_ADVISORYhttps://www.vulncheck.com/advisories/rsync-path-traversal-via-symlink-module-root