CVE-2026-42194: Admidio

Medium severity, CVSS 6.8. EPSS: 0.4% chance of exploitation in the next 30 days.

Admidio is an open-source user management solution. Prior to version 5.0.9, the incomplete SSRF fix in Admidio's fetch_metadata.php validates the resolved IP address but passes the original hostname-based URL to curl_init(), leaving a DNS rebinding TOCTOU window that allows redirecting requests to internal IPs. This issue has been patched in version 5.0.9.

Affected products

• Admidio Admidio: before 5.0.9 (fixed in 5.0.9)

Published 2026-05-07. Last modified 2026-06-17.