CVE-2026-53801rsync < 3.5.0 Symlink Race Condition Directory Traversal

Description

rsync before 3.5.0 contains a symlink race condition vulnerability in the sender's directory scanning logic that allows attackers to cause the sender to enumerate and transfer files outside the module root's intended subtree. Attackers who can create or manipulate symlinks in a path component of the scanned tree can replace a symlink with a directory entry pointing outside the module root between the lstat() call and the subsequent opendir() call, exposing files beyond the intended root in both daemon-mode and non-daemon sender-side scanning.

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• GitHub Security Advisory (GHSA-mch3-qr4p-chgm) vendor-advisoryVendor Advisory
• rsync 3.5.0 Release Notes release-notesProductRelease Notes
• https://www.vulncheck.com/advisories/rsync-symlink-race-condition-directory-traversal third-party-advisoryRelease NotesThird Party Advisory