# CVE-2026-111895: phpMyFAQ authentication bypass in Microsoft Entra ID login

Source: https://junglewise.ai/threats/cve-2026-111895-phpmyfaq-3-2-0-before-4-0-0-and-4-0-2-before-4-2-0-beta-contains  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-17. Updated: 2026-10-17  
License: CC BY 4.0 with a link back

CVE-2026-111895 · Severity: medium · CVSS 6.8 · Published 2026-10-17

phpMyFAQ is a knowledge base and FAQ management system that supports Microsoft Entra ID (Azure) single sign-on for user authentication. An attacker who controls an Entra identity with a username matching an existing phpMyFAQ account can hijack that local account, including administrator accounts, by exploiting a flaw in how the system links user identities. The attack requires the attacker to have access to a Microsoft Entra tenant configured for the target phpMyFAQ instance.

Technologies: [Phpmyfaq](https://junglewise.ai/threats/technologies/phpmyfaq-phpmyfaq-1). Vendors: [Phpmyfaq](https://junglewise.ai/threats/vendors/phpmyfaq).

## Quick answers

**Is CVE-2026-111895 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-111895 being exploited in the wild.

**How severe is CVE-2026-111895?** Medium severity, with a CVSS score of 6.8, published 17 October 2026.

**Which products and versions are affected?** Phpmyfaq 3.2.0 before 4.0.0 and 4.0.2 before 4.2.0-beta.

**Is there a fix for CVE-2026-111895?** Yes: fixed in 4.2.0-beta. Until then: Disable Microsoft Entra ID authentication until the system can be updated to a patched version. Alternatively, restrict access to the Azure authentication callback endpoint and ensure strict identity verification is enforced through Entra tenant policies.</anigation>
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  {
    "kind": "disclosed",
    "at": "2026-10-03",
    "note": "GitHub security advisory GHSA-6hhv-gc4g-f4r7 published"
  },
  {
    "kind": "advisory",
    "at": "2026-10-17",
    "note": "CVE-2026-111895 published on NVD"
  }
] Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-111895 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-111895?** Check whether you run Phpmyfaq at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 4.2.0-beta

Disable Microsoft Entra ID authentication until the system can be updated to a patched version. Alternatively, restrict access to the Azure authentication callback endpoint and ensure strict identity verification is enforced through Entra tenant policies.</anigation>
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  {
    "kind": "disclosed",
    "at": "2026-10-03",
    "note": "GitHub security advisory GHSA-6hhv-gc4g-f4r7 published"
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  {
    "kind": "advisory",
    "at": "2026-10-17",
    "note": "CVE-2026-111895 published on NVD"
  }
]

## Technical details

The vulnerability exists in the Entra ID authentication flow where user linking is based on the mutable preferred_username claim rather than an immutable identifier like oid or sub. When an Entra-authenticated user's preferred_username matches an existing local account, the AuthEntraId::create() method catches and ignores the duplicate login exception while continuing to operate on the pre-existing user object, then activates the account, changes its authentication source to Azure, and overwrites the email. An attacker controlling an Entra identity in the configured tenant whose preferred_username collides with a target phpMyFAQ username can take over that account with no further authentication required.

## Affected products

- phpMyFAQ phpMyFAQ 3.2.0 before 4.0.0 and 4.0.2 before 4.2.0-beta

## References

- [https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-6hhv-gc4g-f4r7](https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-6hhv-gc4g-f4r7)
- [https://www.vulncheck.com/advisories/phpmyfaq-3.2.0-before-4.0.0-and-4.0.2-before-4.2.0-beta-account-takeover-via-entra-id-preferred-username](https://www.vulncheck.com/advisories/phpmyfaq-3.2.0-before-4.0.0-and-4.0.2-before-4.2.0-beta-account-takeover-via-entra-id-preferred-username)

## Related threats

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