CVE-2026-34964
Adminer before 5.5.0 SSRF via PDO DSN Injection
- State
- Published
- Severity
- 6.9 Medium
- Published
- Aug 25, 2026
- Updated
- Aug 26, 2026
- Reserved
- Mar 31, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N | VulnCheck |
| 3.1 | 5.8 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N | VulnCheck |
Weaknesses
- CWE-918 Server-Side Request Forgery (SSRF)
Affected Products
| Product | Versions |
|---|---|
adminervrana |
|
References
- GitHub Security Advisory (GHSA-58cq-mgw2-38m5)vendor-advisory
- VulnCheck Advisory: Adminer before 5.5.0 SSRF via PDO DSN Injectionthird-party-advisory
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