What is CVE-2026-108851?

CVE-2026-108851 is a low-severity vulnerability in Thorsten Phpmyfaq, classified under Missing Authorization. CVSS score: 3.3/10. Published 2026-10-11.

How severe is CVE-2026-108851?

Low severity. CVSS v3 base score is 3.3 out of 10.

Auth bypass in Thorsten Phpmyfaq

CVE-2026-108851

phpMyFAQ through 4.1.10 contains a missing authorization vulnerability in the MCP server faq_search tool that allows MCP clients to read restricted FAQs because Search::searchDatabase() never applies user or group permission checks. Attackers connected to the phpmyfaq:mcp:server can issue search queries to retrieve the full question and answer text of active FAQs restricted to specific users or groups.

Vulnerability class: Broken Access Control

Published 2026-10-11 · last modified 2026-10-11.

CVSS v3 metric

CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Thorsten Phpmyfaq

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/phpmyfaq-mcp-search-visibility (third-party-advisory)
github.com/thorsten/phpMyFAQ/blob/4.1.10/phpmyfaq/src/phpMyFAQ/Search.php (technical-description)
github.com/thorsten/phpMyFAQ/blob/4.1.10/phpmyfaq/src/phpMyFAQ/Service/McpServe… (technical-description)
github.com/thorsten/phpMyFAQ (product)
www.vulncheck.com/advisories/phpmyfaq-through-4.1.10-missing-authorization-via-… (third-party-advisory)

Frequently asked questions

What is CVE-2026-108851?: CVE-2026-108851 is a low-severity vulnerability in Thorsten Phpmyfaq, classified under Missing Authorization. CVSS score: 3.3/10. Published 2026-10-11.
How severe is CVE-2026-108851?: Low severity. CVSS v3 base score is 3.3 out of 10.