Link following in Rsync - CVE-2026-53797
Published: August 13, 2026
Vulnerability identifier: #VU142282
CSH Severity: Low
CVSS v4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-53797
CWE-ID: CWE-59
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to disclose sensitive information.
The vulnerability exists due to improper link resolution before file access in the sender file-content opening logic when processing transferred files by path after the file-list scan. A local user can race a parent directory from a real directory to a symlink pointing outside the source tree to disclose sensitive information.
This issue affects local or non-daemon sender operation and requires winning a race condition after the file-list scan.
Affected software
Rsync
How to mitigate CVE-2026-53797
Install security update from vendor's website.
Rsync - update to 3.5.0