CVE-2026-53790 CRITICAL

CVE-2026-53790: rsync < 3.5.0 Command Injection via Multiple Code Paths

Vendor Rsyncproject
Product rsync
Weakness CWE-78
Published August 13, 2026
Last update August 13, 2026

CVSS base score

9.2/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

August 13, 2026 CVE published
August 13, 2026 Record updated

Related vulnerabilities

04Related CVE