This page tracks the Ubuntu fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-70452 →

UBUNTU-CVE-2026-70452

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 r...

Original description

The description as published by the source.

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.

Source: OSV.dev (Open Source Vulnerabilities) OSV