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cPanel CVE-2026-87899: Privilege Escalation

cPanel is affected by CVE-2026-87899. Execution with unnecessary privileges in cPanel allows remote authenticated users to execute arbitrary code with root privileges. 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. CVSS base score: 9.4.

Critical 9.4 CVSS
cPanel AlmaLinux 8 AlmaLinux 9 CentOS 7 CloudLinux 7 CloudLinux 8 CloudLinux 9

Etkilenen Sürümler

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

Yamalanmış Sürüm

11.134.0.57 / 11.136.0.41 / 11.138.0.8 / WP Squared 11.138.1.11

Varsayılan Güncelleme Komutu

/usr/local/cpanel/scripts/upcp --force

Düzeltme Komutları

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/version

SharedLicense lisansı altında bunun anlamı

Your SharedLicense cPanel license itself is not affected — this is a vulnerability in cPanel, 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.

Execution with unnecessary privileges in cPanel allows remote authenticated users to execute arbitrary code with root privileges.

Reference: https://nvd.nist.gov/vuln/detail/CVE-2026-87899

Sıkça Sorulan Sorular

What is CVE-2026-87899?
Execution with unnecessary privileges in cPanel allows remote authenticated users to execute arbitrary code with root privileges. 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.
Is CVE-2026-87899 being exploited in the wild?
No confirmed public exploitation has been announced at the time of writing. With a CVSS base score of 9.4, apply the update on your next maintenance window and watch the vendor advisory for changes.
How do I fix CVE-2026-87899?
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/version.
Which versions are affected?
Affected: 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. Update to 11.134.0.57 / 11.136.0.41 / 11.138.0.8 / WP Squared 11.138.1.11 or later.

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