CVE-2026-53790

HIGH 8.1

rsync < 3.5.0 Command Injection via Multiple Code Paths

CVSS Score

8.1

EPSS Score

0.0%

EPSS Percentile

0th

rsync before 3.5.0 contains multiple command and argument injection vulnerabilities that allow attackers to execute arbitrary commands by supplying malicious input through several code paths, including the RSYNC_CONNECT_PROG environment variable, daemon hooks, the rsync-ssl wrapper, and remote-shell command newline injection. Attackers can inject shell metacharacters or newline characters into unsanitized user-supplied values such as hostnames and hostspecs to execute arbitrary commands under the privileges of the rsync process or the invoking user.

CWE	CWE-78 CWE-88
Vendor	rsyncproject
Product	rsync
Published	Aug 13, 2026
Last Updated	Aug 13, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

RsyncProject / rsync

0 ≤ 3.4.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/RsyncProject/rsync/security/advisories/GHSA-5hcf-7xxm-rmqq github.com: https://github.com/RsyncProject/rsync/releases/tag/v3.5.0 vulncheck.com: https://www.vulncheck.com/advisories/rsync-command-injection-via-multiple-code-paths

Credits

4drez