Input validation error in Rsync - CVE-2026-53789

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Main Vulnerability Database Vulnerabilities #VU142290

Input validation error in Rsync - CVE-2026-53789

Published: August 13, 2026


Vulnerability identifier: #VU142290
CSH Severity: Medium
CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-53789
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper input validation in the rsync receiver file-list handling when processing file-list entries from a malicious sender under --delete or --force. A remote attacker can send crafted transfer-root or implied-parent entries to cause a denial of service.

User interaction is required to initiate a transfer from a malicious sender.


Affected software

Rsync
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
Debian Linux
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Micro for Rancher
SUSE Linux Enterprise Micro
Anolis OS
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Basesystem Module
openSUSE Leap
openEuler
Fedora
rsync (Red Hat package)
rsync-doc
rsync-daemon
rsync
rsync-debugsource
rsync-debuginfo
rsync-help
rsync (Debian package)

How to mitigate CVE-2026-53789

Install security update from vendor's website.

Rsync - update to 3.5.0
rsync (Red Hat package) - addressed in versions 3.1.3-28.el8_10, 3.5.0-3.el10_2
rsync-doc - update to 3.1.3-28.0.1
rsync-daemon - update to 3.1.3-28.0.1
rsync - update to 3.1.3-28.0.1
rsync-debugsource - addressed in versions 3.2.3-150400.3.34.1, 3.2.7-150600.3.24.1
rsync - addressed in versions 3.2.3-150400.3.34.1, 3.2.7-150600.3.24.1
rsync-debuginfo - addressed in versions 3.2.3-150400.3.34.1, 3.2.7-150600.3.24.1
rsync-help - update to 3.2.7-12
rsync-debugsource - update to 3.2.7-12
rsync-debuginfo - update to 3.2.7-12
rsync - update to 3.2.7-12
rsync - addressed in versions 3.5.0-1.fc43, 3.5.0-1.fc44
rsync (Debian package) - update to 3.5.0+ds1-0+deb13u1

External References

Related Security Bulletins