CVE-2026-53790: samba rsync

CVSS 9.2 (critical) · published 2026-08-13

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.

Affected products (NVD): samba rsync

Fixed in (NVD): 3.5.0

Weakness: CWE-78, CWE-88

Source: NVD CVE-2026-53790

References

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

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