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CVE-2026-56702

8.8 · HIGH

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 defaul…

Published Aug 25, 2026CWE-434EPSS 0.62%

Overview

CVE-2026-56702 is a high-severity vulnerability. It was published on August 25, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/vrana/adminer/security/advisories/GHSA-vcvj-rwwm-x6g5Refwww.vulncheck.com/advisories/adminer-before-unrestricted-file-upload-via-adminerfileuploadGitHubgithub.com/vrana/adminer/security/advisories/GHSA-vcvj-rwwm-x6g5

How CyberStrike helps

Frequently asked questions

What is CVE-2026-56702?

CVE-2026-56702 is a high-severity vulnerability. It was published on August 25, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-56702?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-56702?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-56702?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-56702 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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