CVE-2026-56703: Improper Control of Generation of Code ('Code Injection') in vrana adminer
Adminer versions before 5.4.3 have a remote code execution vulnerability due to improper control of SQLite query handling. Authenticated attackers can exploit the VACUUM INTO command to write PHP code to arbitrary file paths and execute commands on the server.
AI Analysis
Technical Summary
CVE-2026-56703 is a remote code execution vulnerability in Adminer prior to version 5.4.3. The flaw arises because the SQLite VACUUM INTO command is not blocked despite ATTACH restrictions, allowing authenticated users to write PHP code to arbitrary file paths and execute server-side commands. This improper control of code generation leads to a critical security risk.
Potential Impact
An attacker with authentication privileges can execute arbitrary PHP code on the server by exploiting the VACUUM INTO command, potentially leading to full system compromise or unauthorized command execution.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to authenticated users and monitor for suspicious use of the VACUUM INTO command.
CVE-2026-56703: Improper Control of Generation of Code ('Code Injection') in vrana adminer
Description
Adminer versions before 5.4.3 have a remote code execution vulnerability due to improper control of SQLite query handling. Authenticated attackers can exploit the VACUUM INTO command to write PHP code to arbitrary file paths and execute commands on the server.
CVSS v4.0
Score 8.6high
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-56703 is a remote code execution vulnerability in Adminer prior to version 5.4.3. The flaw arises because the SQLite VACUUM INTO command is not blocked despite ATTACH restrictions, allowing authenticated users to write PHP code to arbitrary file paths and execute server-side commands. This improper control of code generation leads to a critical security risk.
Potential Impact
An attacker with authentication privileges can execute arbitrary PHP code on the server by exploiting the VACUUM INTO command, potentially leading to full system compromise or unauthorized command execution.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to authenticated users and monitor for suspicious use of the VACUUM INTO command.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-06-22T18:48:27.059Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a8cf578acd9273b49842852
Added to database: 08/25/2026, 01:52:56 UTC
Last enriched: 08/25/2026, 02:09:53 UTC
Last updated: 08/25/2026, 02:57:08 UTC
Views: 4
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