Link Following Affecting rsync package, versions <3.5.0+ds1-0+deb13u1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.37% (29th percentile)

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  • Snyk IDSNYK-ECHOLATEST-RSYNC-18751762
  • published13 Aug 2026
  • disclosed13 Aug 2026

Introduced: 13 Aug 2026

CVE-2026-53783  (opens in a new tab)
CWE-59  (opens in a new tab)
CWE-88  (opens in a new tab)

How to fix?

Upgrade Echo:latest rsync to version 3.5.0+ds1-0+deb13u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rsync package and not the rsync package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

rsync before 3.5.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability in the rrsync restricted shell wrapper that allows authenticated clients to escape enforced directory restrictions by substituting a symlink for a path component after validation but before transfer processing. Attackers can additionally leverage unrestricted flags such as --copy-unsafe-links, -D, and --log-file through rrsync to read or write files outside the permitted directory subtree.

CVSS Base Scores

version 3.1