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TI-2026-40884 Aliases CVE-2026-56705GHSA-34q8-53jm-qc2r

Adminer before 5.4.3 Remote Code Execution via MSSQL PDO DSN Injection

Priority HIGH 81CWE-73Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00895 59th percentileScored 2026-11-07
Fix Fixed adminer (vrana): 5.4.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Admineradminerbefore 5.4.35.4.3Patch availableCNA
  • adminer VendorAdminer Affected before 5.4.3 Fixed in 5.4.3 Patch available CNA

Remediation

  • Fix · CNA adminer (vrana) Fixed in 5.4.3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    vrana adminer 5.4.3

    6 records Highest priority Priority HIGH 4 HIGH, 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-40882 Adminer before 5.4.3 Remote Code Execution via SQLite VACUUM INTOPriority HIGH 72
    • TI-2026-40881 Adminer before 5.4.3 Unrestricted File Upload via AdminerFileUploadPriority HIGH 66
    • TI-2026-27190 Adminer before 5.4.3 Arbitrary File Deletion via SQLite DropPriority HIGH 65
    Show all 6 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-56705
  2. 2026-10-03 Alias added: GHSA-34q8-53jm-qc2r

References

Advisory 1

  • TI-2021-04411 SSRF in adminer KEVCVSS 3.1HIGH 7.2
  • TI-2026-71163 Remote code execution in Adminer via UTF-8 BOM SQLite bypass CVSS 4.0HIGH 8.6
  • TI-2026-40882 Adminer before 5.4.3 Remote Code Execution via SQLite VACUUM INTO CVSS 4.0HIGH 8.6
  • TI-2026-64854 Adminer before 6.0.2 Privileged-Port SSRF via host_port Regex CVSS 4.0MEDIUM 6.9
  • TI-2026-64852 Adminer before 6.0.2 Unauthenticated SSRF via Elasticsearch Driver CVSS 4.0MEDIUM 6.9
  • TI-2026-40881 Adminer before 5.4.3 Unrestricted File Upload via AdminerFileUpload CVSS 4.0HIGH 7.1
See all 26 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences