CVE-2026-76214phpMyFAQ before 4.1.7 WebAuthn Replay Attack via Challenge
Updated under an hour ago ()
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It affects thorsten phpMyFAQ and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
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.
- CVSS
- 7.4 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- Weakness (CWE)
- CWE-294
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Analyzed
- Record last updated
- Aug 21, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
thorsten phpMyFAQ thorsten:phpmyfaq (from the name) | before 4.1.7; 4.1.7 not affected | CNA record |
phpmyfaq phpmyfaq phpmyfaq:phpmyfaq | before 4.1.7 | NVD |
References
- https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-f534-wv9g-wx2wvendor-advisory, mitigation
- https://www.vulncheck.com/advisories/phpmyfaq-before-webauthn-replay-attack-via-challengethird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.