High severityNVD Advisory· Published Feb 9, 2026· Updated Feb 10, 2026
Adminer has an Unauthenticated Persistent DoS via Array Injection in ?script=version Endpoint
CVE-2026-25892
Description
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
vrana/adminerPackagist | >= 4.6.2, < 5.4.2 | 5.4.2 |
Affected products
2- vrana/adminerv5Range: >= 4.6.2, < 5.4.2
Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-q4f2-39gr-45jhghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-25892ghsaADVISORY
- github.com/vrana/adminer/commit/21d3a3150388677b18647d68aec93b7850e457d3ghsax_refsource_MISCWEB
- github.com/vrana/adminer/releases/tag/v5.4.2ghsax_refsource_MISCWEB
- github.com/vrana/adminer/security/advisories/GHSA-q4f2-39gr-45jhghsax_refsource_CONFIRMWEB
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