Link Following Affecting rsync package, versions <3.4.3-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.14% (4th percentile)

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  • Snyk IDSNYK-ALPINE321-RSYNC-16780685
  • published21 May 2026
  • disclosed20 May 2026

Introduced: 20 May 2026

CVE-2026-43619  (opens in a new tab)
CWE-59  (opens in a new tab)
CWE-367  (opens in a new tab)

How to fix?

Upgrade Alpine:3.21 rsync to version 3.4.3-r0 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 Alpine. See How to fix? for Alpine:3.21 relevant fixed versions and status.

Rsync version 3.4.2 and prior contain symlink race condition vulnerabilities in path-based system calls including chmod, lchown, utimes, rename, unlink, mkdir, symlink, mknod, link, rmdir, and lstat that allow local attackers to redirect operations to files outside the exported rsync module. Attackers with local filesystem access can exploit the timing window between path resolution and syscall execution by swapping symlinks to apply sender-supplied permissions, ownership, timestamps, or filenames to arbitrary files outside the intended module boundary on rsync daemons configured with 'use chroot = no'.

CVSS Base Scores

version 3.1