CVE-2026-42194

EUVD-2026-28296
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.
SSRF
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
GitHub_MCNA
6.8 MEDIUM
NETWORK
LOW
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 7%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
admidioadmidio
𝑥
< 5.0.9
CNA
Common Weakness Enumeration
References
https://github.com/Admidio/admidio/releases/tag/v5.0.9
https://github.com/Admidio/admidio/security/advisories/GHSA-hcjj-chvw-fmw9
https://github.com/Admidio/admidio/security/advisories/GHSA-hcjj-chvw-fmw9