CVE-2026-25892Adminer has an Unauthenticated Persistent DoS via Array Injection in ?script=version Endpoint

Descripción

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.

Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.

Productos y versiones afectados

Referencias y parches

• https://github.com/vrana/adminer/security/advisories/GHSA-q4f2-39gr-45jh ExploitVendor Advisory
• https://github.com/vrana/adminer/commit/21d3a3150388677b18647d68aec93b7850e457d3 Patch
• https://github.com/vrana/adminer/releases/tag/v5.4.2 ProductRelease Notes