SSRF in Vrana Adminer
CVE-2026-34964
Adminer before 5.5.0 contains a server-side request forgery vulnerability in the login form's server field validator, which only inspects leading integers for privileged ports and fails to reject non-numeric port values. Attackers can inject PDO DSN keys like host= and port= into the server parameter to bypass the privileged-port restriction and establish TCP connections to arbitrary internal hosts and ports before authentication.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (35.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/vrana/adminer/security/advisories/GHSA-58cq-mgw2-38m5 (vendor-advisory)
- www.vulncheck.com/advisories/adminer-before-ssrf-via-pdo-dsn-injection (third-party-advisory)
Frequently asked questions
- What is CVE-2026-34964?
- CVE-2026-34964 is a medium-severity vulnerability in Vrana Adminer, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.8/10. Published 2026-08-25.
- How severe is CVE-2026-34964?
- Medium severity. CVSS v3 base score is 5.8 out of 10.