Vulnerability in Rsyncproject Rsync
CVE-2026-53796
rsync before 3.5.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability in the non-daemon receiver's destination directory handling that allows an attacker who can manipulate destination path parent components to redirect file writes to unintended locations. Attackers can substitute a symlink for a component of the destination path between the path resolution and chdir() call, causing the receiver's working directory to be established outside the intended destination tree so that subsequent relative-path file writes land in unintended filesystem locations.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H.
EPSS exploit prediction
EPSS: 0.001 (1.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 1.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: -0.000
Affected products
- Rsyncproject Rsync — versions 0, 3.5.0
Weakness classification (CWE)
References
- github.com/RsyncProject/rsync/releases/tag/v3.5.0 (release-notes)
- github.com/RsyncProject/rsync/security/advisories/GHSA-w75h-ccff-w53m (vendor-advisory)
- www.vulncheck.com/advisories/rsync-toctou-race-condition-via-destination-direct… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-53796?
- CVE-2026-53796 is a medium-severity vulnerability in Rsyncproject Rsync, classified under Improper Link Resolution Before File Access. CVSS score: 6.3/10. Published 2026-08-13.
- How severe is CVE-2026-53796?
- Medium severity. CVSS v3 base score is 6.3 out of 10.