What is CVE-2026-29518?

CVE-2026-29518 is a high-severity vulnerability in Rsyncproject Rsync, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 7.0/10. Published 2026-05-20.

How severe is CVE-2026-29518?

High severity. CVSS v3 base score is 7.0 out of 10.

Vulnerability in Rsyncproject Rsync

CVE-2026-29518

Rsync versions before 3.4.3 contain a time-of-check to time-of-use (TOCTOU) race condition in daemon file handling that allows attackers to redirect file writes outside intended directories by replacing parent directory components with sym…

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

EPSS: 0.000 (0.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Rsyncproject Rsync — versions 0
Samba Rsync

Weakness classification (CWE)

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition

References

disclosure@vulncheck.com (issue-tracking, Patch)
disclosure@vulncheck.com (release-notes, Release Notes)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)
disclosure@vulncheck.com (technical-description)

Frequently asked questions

What is CVE-2026-29518?: CVE-2026-29518 is a high-severity vulnerability in Rsyncproject Rsync, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 7.0/10. Published 2026-05-20.
How severe is CVE-2026-29518?: High severity. CVSS v3 base score is 7.0 out of 10.