cPanel CVE-2026-68490: Information Disclosure
cPanel is affected by CVE-2026-68490. Incorrect permission assignment allows local users to obtain sensitive CalDAV/CardDAV information belonging to other accounts. Affected versions: 11.120.0.0 before 11.134.0.57 | 11.136.0.0 before 11.136.0.41 | 11.138.0.0 before 11.138.0.8. Fixed in 11.134.0.57 / 11.136.0.41 / 11.138.0.8 / WP Squared 11.138.1.11.
Affected Versions
11.120.0.0 before 11.134.0.57 | 11.136.0.0 before 11.136.0.41 | 11.138.0.0 before 11.138.0.8
Patched Version
11.134.0.57 / 11.136.0.41 / 11.138.0.8 / WP Squared 11.138.1.11
Default Update CMD
/usr/local/cpanel/scripts/upcp --forceFix Commands
AlmaLinux / CloudLinux / RHEL / Rocky Linux
# cPanel updates automatically; run manually to patch now
/usr/local/cpanel/scripts/upcp --force
# The update also repairs calendar and contact permissions for existing accounts
cat /usr/local/cpanel/versionWhat this means under a SharedLicense license
Your SharedLicense cPanel license itself is not affected — this is a vulnerability in cPanel & WHM, not in licensing. Licenses continue to work during and after the update; there is no need to re-issue or re-activate anything. If you resell under your own brand, patch client servers too — unpatched installs put your reputation at risk, not your license.
Incorrect permission assignment allows local users to obtain sensitive CalDAV/CardDAV information belonging to other accounts. The information exposed includes calendar events and contacts of other accounts on the server.
Reference: https://nvd.nist.gov/vuln/detail/CVE-2026-68490
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References
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