SB20260511111 - Multiple vulnerabilities in cPanel & WHM

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Main Vulnerability Database SB20260511111

SB20260511111 - Multiple vulnerabilities in cPanel & WHM

Published: May 11, 2026

Security Bulletin ID SB20260511111
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Medium 33% Low 67%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 vulnerabilities.


1) Improper access control (CVE-ID: CVE-2026-29201)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote user to disclose sensitive information.

The vulnerability exists due to improper access control in the LOADFEATUREFILE adminbin call when handling crafted requests. A remote user can send a specially crafted request to disclose sensitive information.


2) Code Injection (CVE-ID: CVE-2026-29202)

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote user to execute arbitrary code.

The vulnerability exists due to code injection in the create_user API call when processing crafted input. A remote user can submit crafted input to execute arbitrary code.


3) Link following (CVE-ID: CVE-2026-29203)

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

CVSSv4: 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/E:U/U:Clear


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.


Remediation

Install update from vendor's website.

References