Link following in cPanel - CVE-2026-29203
Published: May 11, 2026
Vulnerability identifier: #VU131013
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-29203
CWE-ID: CWE-59
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service and possibly escalate privileges.
The vulnerability exists due to unsafe symlink handling in file permission handling when processing symlinks. A local user can chmod an arbitrary file to cause a denial of service and possibly escalate privileges.
Affected software
cPanel
How to mitigate CVE-2026-29203
Install security update from vendor's website.
cPanel - addressed in versions 11.86.0.43, 11.94.0.30, 11.102.0.41, 11.110.0.117, 11.118.0.66, 11.124.0.37, 11.126.0.58, 11.130.0.22, 11.132.0.31, 11.134.0.25, 11.136.0.9, 11.136.1.10