CVE-2026-56703: Improper Control of Generation of Code ('Code Injection') in vrana adminer
Description
Adminer versions prior to 5.4.3 contain a remote code execution vulnerability related to improper handling of SQLite VACUUM INTO commands. Authenticated attackers can exploit this flaw to write and execute arbitrary PHP code on the server by bypassing ATTACH restrictions. This vulnerability has a high severity rating and a CVSS score of 8.6.
CVSS v4.0
Score 8.6high
Affected software
vrana
adminer
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-56703 is a remote code execution vulnerability in Adminer before version 5.4.3. The flaw arises because the application does not block the SQLite VACUUM INTO command despite ATTACH restrictions, allowing authenticated users to write PHP code to arbitrary file paths and execute commands on the server. This improper control of code generation enables attackers with high privileges to compromise the server.
Potential Impact
An authenticated attacker with sufficient privileges can execute arbitrary PHP code on the server, potentially leading to full system compromise. This can result in unauthorized access, data theft, or further exploitation of the affected system.
Mitigation Recommendations
No official patch or remediation level is currently confirmed. Users should upgrade Adminer to version 5.4.3 or later once available. Until then, restrict access to Adminer to trusted users only and monitor for suspicious activity. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-06-22T18:48:27.059Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a8cf578acd9273b49842852
Added to database: 08/25/2026, 01:52:56 UTC
Last enriched: 09/10/2026, 08:07:13 UTC
Last updated: 10/07/2026, 18:48:21 UTC
Views: 54
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