This page tracks the Ubuntu fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-53793 →

UBUNTU-CVE-2026-53793

rsync before 3.5.0 contains a path confinement bypass vulnerability that allows remote clients to escape the intended inner-module root confinement by...

Original description

The description as published by the source.

rsync before 3.5.0 contains a path confinement bypass vulnerability that allows remote clients to escape the intended inner-module root confinement by constructing paths that resolve outside the chroot boundary when the module root contains a /./ boundary marker. Attackers can exploit improper handling of the /./ notation or forge delta-basis transfers referencing xname paths that cross the /./ boundary to gain unauthorized read or write access to files outside the module's subtree.

Source: OSV.dev (Open Source Vulnerabilities) OSV