CVE-2026-56705 PUBLISHED

Adminer before 5.4.3 Remote Code Execution via MSSQL PDO DSN Injection

Assigner: VulnCheck
Reserved: 22.06.2026 Published: 25.08.2026 Updated: 25.08.2026

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.

CVSS Vector: 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
CVSS Score: 9.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 9.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	vrana
Product	adminer
Versions	Default: unaffected affected from 0 to 5.4.3 (excl.) Version 5.4.3 is unaffected

CVE-2026-56705 PUBLISHED

Adminer before 5.4.3 Remote Code Execution via MSSQL PDO DSN Injection

Metrics

Product Status

Credits

References

Problem Types