CVE-2026-53801
MediumCVSS 5.9Exploitation Probability (EPSS)
Low risk21th percentile - higher than 21% of all known CVEs
Summary
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.
Risk Assessment
Unauthorized disclosure of files outside the intended directory may occur, potentially compromising data confidentiality in daemon and non-daemon modes.
Recommendation
Update rsync to version 3.5.0 or later, which includes a fix, and restrict the ability to create symlinks in source directories.
Original NVD description (English source)
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.