Cyber Posture

CVE-2026-29204

Critical

Published: 12 May 2026

Published
12 May 2026
Modified
12 May 2026
KEV Added
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Patch
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CVSS Score 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
EPSS Score N/A
Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-29204 is a critical-severity Authorization Bypass Through User-Controlled Key (CWE-639) vulnerability in Whmcs (inferred from references). Its CVSS base score is 10.0 (Critical).

Operationally, it is not currently listed in the CISA KEV catalog.

Threat & Defense Details

Likely Mitigating ControlsAI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

AC-24 Access Control Decisions
addresses: CWE-639

Per-request decision making makes it harder to bypass authorization using user-controlled keys without proper validation in the decision process.

AC-3 Access Enforcement
addresses: CWE-639

Consistent enforcement of approved authorizations makes bypassing via user-controlled keys ineffective.

NVD Description

Insufficient ownership checks in `clientarea.php` allow an authenticated client area user to submit requests using another user’s `addonId` without any ownership validation leading to unauthorized access to the victim's resources and their cPanel account.

Deeper analysisAI

Automated synthesis unavailable for this CVE.

Details

CWE(s)
CWE-639

Affected Products

Whmcs
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inferred from references and description; NVD did not file a CPE for this CVE

References