Critical severity · published Jul 27, 2026
CVE-2026-66398
phpMyFAQ before 4.1.6 Remote Code Execution via Configuration API
9.4
CVSS
0.4%
EPSS
No
On KEV
Description
phpMyFAQ before v4.1.6 contains a remote code execution vulnerability in the configuration API that allows authenticated administrators with CONFIGURATION_EDIT and ATTACHMENT_ADD privileges to write arbitrary PHP files by manipulating the upgrade.lastDownloadedPackage setting. Attackers can upload a malicious ZIP file as an attachment, point the updater configuration to its stored path, and extract it into the application root to achieve code execution as the web server user.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 35% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PH
phpMyFAQ · thorsten
before 4.1.6 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-66398
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-66398
github.com
https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-4fv7-8rr6-rf2w
www.vulncheck.com
https://www.vulncheck.com/advisories/phpmyfaq-before-remote-code-execution-via-configuration-api
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