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CVE-2026-46364

phpMyFAQ - SQL Injection via User-Agent Header in BuiltinCaptcha

Published: May 15, 2026Updated: May 28, 2026 Sources: CVE List NVDCWE-89
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
1.3%
Top 33.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
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Description

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-89

Affected Products

phpmyfaqthorsten
On-premWeb App
Web & CMS Plugins
thorstenindividual-devWeb & CMS Pluginsaka thorsten/phpmyfaq, phpmyfaq

Attack Graph

Products CVE Techniques Tactics

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Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

1 technique
Initial Access
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References

https://github.com/thorsten/phpMyFAQ/commit/b9f25109fddb38eee19987183798638d07943f92
github.com
https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-289f-fq7w-6q2w
github.com
https://www.vulncheck.com/advisories/phpmyfaq-sql-injection-via-user-agent-header-in-builtincaptcha
vulncheck.com

Timeline

Published
May 15, 2026
Last Updated
May 28, 2026

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