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TI-2026-76118 Aliases CVE-2026-111911GHSA-768h-xwv2-fwp3

Authentication bypass in phpMyFAQ via WebAuthn credential injection

Priority HIGH 81CWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-287.

Summary

phpMyFAQ 4.0.0 before 4.1.9 contains an authentication bypass in its WebAuthn registration endpoints, which attach credentials to any account without authentication or challenge validation. An unauthenticated remote attacker can stage a victim's username, register a passkey with a forged attestation, and then log in without the password or TOTP, taking over the account.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

phpMyFAQ 4.0.0 before 4.1.9 contains an authentication bypass vulnerability where WebAuthn registration endpoints attach credentials to any account without authentication or challenge validation. Attackers can stage a victim username, submit a forged fmt=none attestation to register a passkey, then log in bypassing passwords and TOTP for account takeover.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00533 45th percentileScored 2026-11-07
Fix Fixed phpMyFAQ (thorsten): 4.1.9

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
thorstenphpMyFAQ4.0.0 to before 4.1.94.1.9Patch availableCNA
  • phpMyFAQ Vendorthorsten Affected 4.0.0 to before 4.1.9 Fixed in 4.1.9 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:phpmyfaq:phpmyfaq:*:*:*:*:*:*:*:*——thorsten
  • cpe:2.3:a:phpmyfaq:phpmyfaq:*:*:*:*:*:*:*:* Versions — — ·thorsten

Remediation

Upgrade phpMyFAQ to version 4.1.9 or later, which fixes the flaw.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA phpMyFAQ (thorsten) Fixed in 4.1.9

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    thorsten phpMyFAQ 4.1.9

    14 records Highest priority Priority HIGH 5 HIGH, 6 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2026-76115 Authorization bypass in phpMyFAQ REST API edits restricted FAQsPriority HIGH 73
    • TI-2026-76092 phpMyFAQ e-mail change lacks password check, enabling takeoverPriority HIGH 73
    • TI-2026-76113 Cross-site request forgery in phpMyFAQ search index administrationPriority HIGH 70
    Show all 14 records →

Timeline

  1. 2026-10-18 Threatist record created from CVE-2026-111911
  2. 2026-10-18 Alias added: GHSA-768h-xwv2-fwp3
  3. 2026-10-19 CISA SSVC decision points changed
  4. 2026-10-19 Priority changed: MEDIUM → HIGH

References

Advisory 2

  • TI-2023-00296 Improper Authentication in thorsten/phpmyfaq CVSS 3.1CRITICAL 9.8
  • TI-2026-32868 phpMyFAQ - Unauthenticated Two-Factor Authentication Brute-Force via /admin/check Endpoint CVSS 4.0CRITICAL 9.3
  • TI-2026-76108 Unauthenticated denial of service in phpMyFAQ API pagination CVSS 4.0HIGH 8.7
  • TI-2026-53313 phpMyFAQ 3.1.0 through 4.1.6 Authentication Bypass via LDAP CVSS 4.0HIGH 8.8
  • TI-2026-34083 phpMyFAQ - Unauthenticated Information Disclosure via getIdFromSolutionId Permission Bypass CVSS 4.0HIGH 8.7
  • TI-2026-27777 phpMyFAQ - Unauthenticated Password Reset via User Password Update Endpoint CVSS 4.0HIGH 8.8
See all 224 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences