phpMyFAQ before 4.1.8 Authentication Bypass via Two-Factor Disable (CVE-2026-85590) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-85590

phpMyFAQ before 4.1.8 Authentication Bypass via Two-Factor Disable

Answer in brief

CVE-2026-85590 records a Unknown severity vulnerability in phpMyFAQ before 4.1.8 Authentication Bypass via Two-Factor Disable. The current sources do not mark it as known exploited. The current feed maps thorsten/phpMyFAQ (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 4, 2026Updated Sep 4, 2026Source checked Sep 4, 2026First seen by HOL Sep 4, 2026Material review Sep 4, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps thorsten/phpMyFAQ (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
thorsten/phpMyFAQgeneric	>=0 <4.1.8	4.1.8

Recommended response

Check inventory. Check lockfiles and deployed manifests for thorsten/phpMyFAQ.
Review the reported fix. Update thorsten/phpMyFAQ to 4.1.8 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 4, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 4, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 4, 2026

Sources and claim methodology

Upstream source description

phpMyFAQ before 4.1.8 contains an authentication bypass vulnerability in its two-factor authentication (TOTP) disable functionality. The removeTwofactorConfig() handler (reachable via POST /api/user/remove-twofactor) verifies only that the user is logged in and that a valid CSRF token is supplied, then disables TOTP without requiring password re-entry or a current TOTP code. The same downgrade is also reachable inline via PUT /api/user/data/update, which accepts a plain twofactor_enabled form field under the same session+CSRF-only guard. An attacker who has hijacked a user's session can silently strip two-factor protection from any account, including administrator accounts, after which password-only authentication succeeds.

Quoted source text, attributed separately from HOL analysis.