Remote Code Execution in Adminer SQLite Query Handling
CVE-2026-56703

8.6HIGH

Key Information:

Vendor

Vrana

Status
Adminer
Vendor
CVE Published:
25 August 2026

What is CVE-2026-56703?

A vulnerability in Adminer before version 5.4.3 allows authenticated attackers to exploit weaknesses in SQLite query processing. Specifically, the VACUUM INTO command is not sufficiently restricted by ATTACH limitations, enabling malicious users to write PHP code to arbitrary file paths on the server and execute commands, potentially compromising the entire system.

Affected Version(s)

adminer 0 < 5.4.3

adminer 5.4.3

References

https://github.com/vrana/adminer/security/advisories/GHSA...
vendor-advisory
https://www.vulncheck.com/advisories/adminer-before-remot...
third-party-advisory

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

AmirMSafari
.