CVE-2026-53784

Summary

rsync before 3.5.0 contains a path traversal vulnerability that allows remote clients to access files outside the intended module root when use chroot is disabled and the module root path or a component of it is a symlink. The daemon calls chdir() to the module root at session initialization without resolving symlinks via realpath() or equivalent, causing subsequent relative-path operations to reference files relative to the symlink target rather than the intended module root, enabling unauthorized file access.

Affected Software

VendorProductVersion RangeStatus
RsyncProjectrsync0 <= 3.4.4affected
RsyncProjectrsync3.5.0unaffected

Weaknesses

  • CWE-59: CWE-59 Improper Link Resolution Before File Access ('Link Following')

References