PT-2026-22389 · Phpmyfaq · Phpmyfaq

Offensive-Ai · Published 2026-02-27 · Updated 2026-03-04 · CVE-2026-27836

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Name of the Vulnerable Software and Affected Versions phpMyFAQ versions prior to 4.0.18

Description The WebAuthn prepare endpoint, /api/webauthn/prepare, in versions prior to 4.0.18 lacks authentication, CSRF protection, captcha, or configuration checks. This allows unauthenticated attackers to create an unlimited number of user accounts, even when registration is disabled. The vulnerable parameter is not specified.

Recommendations Update to version 4.0.18 or later.

Exploit

Fix

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

CVE-2026-27836

GHSA-W22Q-M2FM-X9F4

Affected Products

Phpmyfaq

References · 11

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27836.json · Exploit
• https://github.com/thorsten/phpMyFAQ/commit/f2ab673f0668753cd0f7c7c8bc7fd2304dcf5cb1 · Patch
• https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-w22q-m2fm-x9f4 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-27836 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-27836 · Security Note
• https://osv.dev/vulnerability/GHSA-w22q-m2fm-x9f4 · Vendor Advisory
• https://github.com/thorsten/phpMyFAQ · Note
• https://twitter.com/CVEnew/status/2027744247995085059 · Twitter Post
• https://t.me/cveNotify/154140 · Telegram Post
• https://twitter.com/_cvereports/status/2027559421589557334 · Twitter Post
• https://twitter.com/cracbot/status/2029150059829575917 · Twitter Post