CVE-2026-70452: Rsyncproject Rsync

High severity, CVSS 7.4. EPSS: 0.5% chance of exploitation in the next 30 days.

rsync 3.1.0 before 3.5.0 contains an access control bypass vulnerability that allows remote attackers to circumvent hosts deny rules by inducing DNS resolution failures during hostname-based access control evaluation. When a DNS lookup for a hostname-based deny rule fails, the daemon skips the rule rather than defaulting to a deny decision, enabling attackers who can trigger DNS failures to bypass module-level IP access controls and gain unauthorized access to restricted module file trees.

Affected products

• Rsyncproject Rsync: from 3.1.0, up to and including 3.4.4

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