CVE-2026-56705

critical

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.

References

https://github.com/ChiefYoru/Exploit-CVE-2026-56705

https://www.vulncheck.com/advisories/adminer-before-remote-code-execution-via-mssql-pdo-dsn-injection

https://github.com/vrana/adminer/security/advisories/GHSA-r4x9-5m63-3vxw

Details

Source: Mitre, NVD

Published: 2026-08-25

Updated: 2026-08-25

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

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

Severity: Critical

CVSS v4

Base Score: 9.3

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

Severity: Critical

EPSS

EPSS: 0.00497