vrana adminer up to 5.4.1 openssl_verify version[] denial of service

Summaryinfo

A vulnerability was found in vrana adminer up to 5.4.1 and classified as problematic. Affected by this vulnerability is the function openssl_verify. The manipulation of the argument version[] results in denial of service. This vulnerability was named CVE-2026-25892. The attack may be performed from remote. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in vrana adminer up to 5.4.1. It has been classified as problematic. Affected is the function openssl_verify. The manipulation of the argument version[] with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. CVE summarizes:

Adminer is open-source database management software. Adminer v5.4.1 and earlier has a version check mechanism where adminer.org sends signed version info via JavaScript postMessage, which the browser then POSTs to ?script=version. This endpoint lacks origin validation and accepts POST data from any source. An attacker can POST version[] parameter which PHP converts to an array. On next page load, openssl_verify() receives this array instead of string and throws TypeError, returning HTTP 500 to all users. Upgrade to Adminer 5.4.2.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-25892 since 02/06/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability scanner Nessus provides a plugin with the ID 298460 (Linux Distros Unpatched Vulnerability : CVE-2026-25892), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.4.2 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 21d3a3150388677b18647d68aec93b7850e457d3 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (298460). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• vrana

Name

• adminer

Version

• 5.4.0
• 5.4.1

License

• open-source

Website

• Product: https://github.com/vrana/adminer/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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