What is CVE-2026-53803?

CVE-2026-53803 is a high-severity vulnerability in Rsyncproject Rsync, classified under Improper Link Resolution Before File Access. CVSS score: 7.8/10. Published 2026-08-13.

How severe is CVE-2026-53803?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Rsyncproject Rsync

CVE-2026-53803

rsync before 3.5.0 contains a symlink following vulnerability that allows local attackers to overwrite arbitrary files by placing a symlink at a predictable output path such as --log-file, --write-batch, or daemon-mode log and statistics p…

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Rsyncproject Rsync — versions 0, 3.5.0

Weakness classification (CWE)

CWE-59 — Improper Link Resolution Before File Access

References

disclosure@vulncheck.com (release-notes)
disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-53803?: CVE-2026-53803 is a high-severity vulnerability in Rsyncproject Rsync, classified under Improper Link Resolution Before File Access. CVSS score: 7.8/10. Published 2026-08-13.
How severe is CVE-2026-53803?: High severity. CVSS v3 base score is 7.8 out of 10.