CVE-2026-56705 Adminer before 5.4.3 Remote Code Execution via MSSQL PDO DSN Injection
Unauthenticated attackers can inject ODBC parameters to write PHP code to the web root, achieving remote code execution in Adminer.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-56705?
CVE-2026-56705 is a critical code injection vulnerability in vrana adminer, published on 25 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-73
Which versions are affected by CVE-2026-56705?
How do I fix CVE-2026-56705?
Upgrade to a fixed version.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-56705 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56705 exists.
Public exploit code: 2 proofs of concept on GitHub.
Sources
Also known as DEBIAN-CVE-2026-56705, GHSA-34q8-53jm-qc2r, GHSA-r4x9-5m63-3vxw, UBUNTU-CVE-2026-56705.