CVE-2026-53788: Rsyncproject Rsync

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

rsync before 3.5.0 contains a newline injection vulnerability in the name-converter uid/gid mapping interface that allows local attackers to forge protocol messages by creating user or group names containing newline characters. Attackers can inject malicious newline characters into names communicated over the pipe-based line-oriented protocol to cause the rsync daemon to process attacker-influenced data as legitimate protocol input, corrupting uid/gid mapping logic.

Affected products

• Rsyncproject Rsync: up to and including 3.4.4

Published 2026-08-13. Last modified 2026-09-08.