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TI-2026-40881 Aliases CVE-2026-56702GHSA-p84v-vg3f-p9m6

Adminer before 5.4.3 Unrestricted File Upload via AdminerFileUpload

Priority HIGH 66CWE-434Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-434.

Summary

Adminer versions before 5.4.3 contain an unrestricted file upload vulnerability in the AdminerFileUpload plugin that allows authenticated users to upload PHP files by exploiting a permissive default extension allowlist. Attackers can upload PHP webshells to columns ending in _path and execute arbitrary code as the web-server user when uploadPath is web-served.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00616 49th percentileScored 2026-11-07
Fix Fixed adminer (vrana): 5.4.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
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-2026-40884 Adminer before 5.4.3 Remote Code Execution via MSSQL PDO DSN InjectionPriority HIGH 81
    • TI-2026-40882 Adminer before 5.4.3 Remote Code Execution via SQLite VACUUM INTOPriority HIGH 72
    • 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-2026-56702
  2. 2026-10-03 Alias added: GHSA-p84v-vg3f-p9m6

References

Advisory 1

  • TI-2021-04411 SSRF in adminer KEVCVSS 3.1HIGH 7.2
  • TI-2026-40884 Adminer before 5.4.3 Remote Code Execution via MSSQL PDO DSN Injection CVSS 4.0CRITICAL 9.3
  • 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
See all 26 →

Sources

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