CVE-2026-53793rsync < 3.5.0 Path Confinement Bypass via /./ Boundary Marker in Chroot Mode

Descripción

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.

Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.

Productos y versiones afectados

Referencias y parches

• GitHub Security Advisory (GHSA-wj7w-vh23-mm44) vendor-advisoryVendor Advisory
• rsync 3.5.0 Release Notes release-notesRelease Notes
• https://www.vulncheck.com/advisories/rsync-path-confinement-bypass-via-boundary-marker-in-chroot-mode third-party-advisoryThird Party Advisory