by Kastro
Paper/Archive/CVE-2026-46364

CVE-2026-46364

thorsten phpmyfaq — phpMyFAQ - SQL Injection via User-Agent Header in BuiltinCaptcha

EPSS 2%CVSS 9.8
critical.is priorityof 100
45
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 77.3.773 × 2015.5No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

phpMyFAQ before 4.1.2 contains an unauthenticated SQL injection vulnerability in BuiltinCaptcha::garbageCollector() and BuiltinCaptcha::saveCaptcha() methods that interpolate unsanitized User-Agent headers into DELETE and INSERT queries. Unauthenticated attackers can exploit the public GET /api/captcha endpoint by crafting malicious User-Agent headers to perform time-based blind SQL injection, extracting sensitive data including user credentials, admin tokens, and SMTP credentials from the database.

Affected

ProductAffectedFixed inSource
phpmyfaq< 4.1.24.1.2CNA

Scores by source

VulnCheck (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

advisorygithub.com/thorsten/phpMyFAQ/security/advisories/GHSA-289f-fq7w-6q2wpatchgithub.com/thorsten/phpMyFAQ/commit/b9f25109fddb38eee19987183798638d07943f92writeupvulncheck.com/advisories/phpmyfaq-sql-injection-via-user-agent-header-in-builtincaptcha