What is CVE-2026-53788?

CVE-2026-53788 is a medium-severity vulnerability in Rsyncproject Rsync, classified under CRLF Injection. CVSS score: 6.5/10. Published 2026-08-13.

How severe is CVE-2026-53788?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Rsyncproject Rsync

CVE-2026-53788

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 c…

Vulnerability class: CRLF Injection

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Rsyncproject Rsync — versions 0, 3.5.0

Weakness classification (CWE)

CWE-93 — CRLF Injection

References

disclosure@vulncheck.com (release-notes)
disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-53788?: CVE-2026-53788 is a medium-severity vulnerability in Rsyncproject Rsync, classified under CRLF Injection. CVSS score: 6.5/10. Published 2026-08-13.
How severe is CVE-2026-53788?: Medium severity. CVSS v3 base score is 6.5 out of 10.