CVE-2026-53788
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk17th percentile - higher than 17% of all known CVEs
Summary
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 to corrupt uid/gid mapping logic.
Risk Assessment
The risk is the possibility of manipulating uid/gid mapping logic, potentially leading to unauthorized access or privilege escalation.
Recommendation
It is recommended to upgrade rsync to version 3.5.0 or later, which eliminates this vulnerability.
Original NVD description (English source)
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.