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TI-2026-76106 Aliases CVE-2026-111898GHSA-8rmr-jc2p-xv7g

Authentication bypass in phpMyFAQ Keycloak login allows account takeover

Priority HIGH 69CWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
High
Attack requirements
Present
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 4.2.0-alpha before 4.2.0-beta contains an authentication bypass flaw in its Keycloak login, classified as CWE-287 (Improper Authentication). The application links Keycloak identities to existing local accounts by matching preferred_username or email, so an attacker who controls a Keycloak identity with a colliding username or unverified email can take over the local account. A successful takeover grants superadmin privileges. Exploitation is possible over the network with high attack complexity and low privileges (PR:L).

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

Description from the CNA

phpMyFAQ 4.2.0-alpha before 4.2.0-beta contains an authentication bypass vulnerability that allows Keycloak users to take over local accounts by matching preferred_username or email. Attackers controlling a Keycloak identity with a colliding username or unverified email can log in through /auth/keycloak/authorize to bind their subject and gain superadmin privileges.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00435 38th percentileScored 2026-11-07
Fix Fixed phpMyFAQ (thorsten): 4.2.0-beta

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
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
thorstenphpMyFAQ4.2.0-alpha to before 4.2.0-beta4.2.0-betaPatch availableCNA
  • phpMyFAQ Vendorthorsten Affected 4.2.0-alpha to before 4.2.0-beta Fixed in 4.2.0-beta 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 4.2.0-beta 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 4.2.0-beta

Fixed in the same release

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

  • Release ·

    thorsten phpMyFAQ 4.2.0-beta

    24 records Highest priority Priority HIGH 10 HIGH, 10 MEDIUM, 4 LOW

    Other records, highest priority first

    • TI-2026-76108 Unauthenticated denial of service in phpMyFAQ API paginationPriority HIGH 77
    • 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
    Show all 24 records →

Timeline

  1. 2026-10-18 Threatist record created from CVE-2026-111898
  2. 2026-10-18 Alias added: GHSA-8rmr-jc2p-xv7g

References

Advisory 1

  • TI-2023-00296 Improper Authentication in thorsten/phpmyfaq CVSS 3.1CRITICAL 9.8
  • TI-2026-76118 Authentication bypass in phpMyFAQ via WebAuthn credential injection CVSS 4.0CRITICAL 9.3
  • 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
See all 224 →

Sources

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