CVE-2026-56705
Adminer before 5.4.3 Remote Code Execution via MSSQL PDO DSN Injection
- State
- Published
- Severity
- 9.3 Critical
- Published
- Aug 25, 2026
- Updated
- Aug 25, 2026
- Reserved
- Jun 22, 2026
Description
Adminer before 5.4.3 fails to sanitize the server field before constructing a PDO DSN string, allowing unauthenticated attackers to inject ODBC parameters via semicolons. Attackers can inject TraceFile and TraceOn parameters to write PHP code to the web root, achieving remote code execution when the trace file is accessed.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-73 External Control of File Name or Path
Affected Products
| Product | Versions |
|---|---|
adminervrana |
|
References
- GitHub Security Advisory (GHSA-r4x9-5m63-3vxw)vendor-advisory
- VulnCheck Advisory: Adminer before 5.4.3 Remote Code Execution via MSSQL PDO DSN Injectionthird-party-advisory
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