High · CVSS 7.4CVE-2026-76214

phpMyFAQ before 4.1.7 WebAuthn Replay Attack via Challenge

Answer in brief

CVE-2026-76214 records a High severity (CVSS 7.4) vulnerability in phpMyFAQ before 4.1.7 WebAuthn Replay Attack via Challenge. 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 Aug 19, 2026Updated Sep 1, 2026Source checked Oct 3, 2026First seen by HOL Aug 19, 2026Material review Sep 1, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.4
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.4. 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.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:a:phpmyfaq:phpmyfaq::::::::	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
thorsten/phpMyFAQgeneric	>=0 <4.1.7	4.1.7

Recommended response

Check inventory. Check lockfiles and deployed manifests for thorsten/phpMyFAQ.
Review the reported fix. Update thorsten/phpMyFAQ to 4.1.7 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 1, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 19, 2026

Sources and claim methodology

Upstream source description

phpMyFAQ before 4.1.7 fails to persist the WebAuthn login challenge generated by prepareForLogin, because neither WebAuthn controller saves the mutated key objects back to the database. At login the anti-replay comparison is skipped by its own null guard, allowing an attacker who captures a successful WebAuthn assertion to replay it indefinitely and authenticate as the user without any interaction or hardware key.

Quoted source text, attributed separately from HOL analysis.