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Vulnerability · Published Aug 13, 2026 · Assigned by VulnCheck

CVE-2026-53801rsync < 3.5.0 Symlink Race Condition Directory Traversal

Medium 5.9

In plain English

A medium-severity security flaw in rsync from RsyncProject. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)0.3%top 78.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

rsync before 3.5.0 contains a symlink race condition vulnerability in the sender's directory scanning logic that allows attackers to cause the sender to enumerate and transfer files outside the module root's intended subtree. Attackers who can create or manipulate symlinks in a path component of the scanned tree can replace a symlink with a directory entry pointing outside the module root between the lstat() call and the subsequent opendir() call, exposing files beyond the intended root in both daemon-mode and non-daemon sender-side scanning.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.21rsync3.5.0-r0ALPINE-CVE-2026-53801
Alpine:v3.22rsync3.5.0-r0ALPINE-CVE-2026-53801
Alpine:v3.23rsync3.5.0-r0ALPINE-CVE-2026-53801
Alpine:v3.24rsync3.5.0-r0ALPINE-CVE-2026-53801
Debian:12rsyncno fix listedDEBIAN-CVE-2026-53801
Debian:13rsync3.5.0+ds1-0+deb13u1DEBIAN-CVE-2026-53801
Debian:14rsync3.5.0+ds1-1DEBIAN-CVE-2026-53801
Ubuntu:22.04:LTSrsyncno fix listedUBUNTU-CVE-2026-53801
Ubuntu:24.04:LTSrsyncno fix listedUBUNTU-CVE-2026-53801
Ubuntu:26.04:LTSrsyncno fix listedUBUNTU-CVE-2026-53801
Ubuntu:26.10rsyncno fix listedUBUNTU-CVE-2026-53801

Affected products (as reported)

VendorProductVersions
RsyncProject rsync 0 – through 3.4.4

Weakness: CWE-59, CWE-367 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

References