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Vulnerability record · CVE-2026-56705 · published 25 August 2026

CVE-2026-56705: Adminer before 5.4.3 fails to sanitize the server field before constructing a PDO DSN string, allowing unauthe…

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.

9.3 CVSS 4.0 Critical EPSS 0.90% · top 42.1% CWE-73 · CWE-73 Deferred
9.3CVSS 4.0 base score
0.90%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
8 Sep 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-56705), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.