CVE-2026-56703 vrana CVE debrief

Who should care

Defenders and administrators of systems using Adminer, especially those with high-severity vulnerabilities, should assess exposure and prioritize remediation to prevent potential remote code execution attacks.

Why it matters

CVE-2026-56703 is a high-severity vulnerability in Adminer that allows authenticated attackers to execute remote code via SQLite query handling. Defenders should assess exposure, prioritize remediation, and verify inventory for potential impact.

• Potential for remote code execution on the server
• Ability for attackers to write PHP code to arbitrary file paths
• Execution of commands on the server by authenticated attackers
• High CVSS score indicating high severity

Technical summary

The vulnerability in Adminer before version 5.4.3 allows authenticated attackers to execute remote code via SQLite query handling. The issue arises from the lack of blocking for VACUUM INTO despite ATTACH restrictions, enabling attackers to write PHP code to arbitrary file paths and execute commands on the server. This high-severity vulnerability, with a CVSS score of 8.6, requires immediate attention. Defenders should assess exposure, prioritize remediation, and verify inventory for potential impact. The CVE record and NVD entry provide details on the vulnerability, but specific details on affected versions and remediation are limited.

Defensive priority

High priority for remediation due to high CVSS score and potential for remote code execution

Recommended defensive actions

• Assess exposure by checking if Adminer versions prior to 5.4.3 are in use
• Prioritize remediation for high-severity vulnerability
• Verify inventory for potential impact and apply patches or mitigations as necessary
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its high CVSS score of 8.6 and the potential for remote code execution. However, specific details on affected versions and remediation are limited.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.