CVE-2026-76214 phpMyFAQ before 4.1.7 WebAuthn Replay Attack via Challenge
Attackers can replay captured WebAuthn assertions to bypass authentication and take over user accounts in phpMyFAQ.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-76214?
CVE-2026-76214 is a critical authentication bypass vulnerability in Phpmyfaq Phpmyfaq, published on 19 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-294
Which versions are affected by CVE-2026-76214?
It affects 1 product.
Products include Phpmyfaq Phpmyfaq.
How do I fix CVE-2026-76214?
No fix has been published for CVE-2026-76214 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-76214 being exploited?
There is no known exploitation of CVE-2026-76214 in the wild and no public exploit code.
Other vulnerabilities in Phpmyfaq Phpmyfaq
- CVE-2023-0310 Cross-site Scripting (XSS) - Stored in thorsten/phpmyfaq
- CVE-2022-4407 Cross-site Scripting (XSS) - Reflected in thorsten/phpmyfaq
- CVE-2017-11187 Security feature bypass in n/a
- CVE-2026-76213 phpMyFAQ before 4.1.7 2FA Brute-Force via Session-Scoped Throttle
- CVE-2023-5316 Cross-site Scripting (XSS) - DOM in thorsten/phpmyfaq
Sources
Also known as GHSA-f534-wv9g-wx2w, GHSA-wg4g-rgc9-r6gj.