CVE-2026-56704Adminer before 5.4.3 Cross-Site Scripting via MySQL Version String

Description

Adminer before 5.4.3 inserts unsanitized database server version strings into script tags with valid CSP nonces without proper validation. Attackers controlling a rogue MySQL server can return crafted version strings that break out of the JavaScript context and execute arbitrary code, bypassing Content Security Policy protections.

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• GitHub Security Advisory (GHSA-h6jr-7pr6-grgj) vendor-advisory
• VulnCheck Advisory: Adminer before 5.4.3 Cross-Site Scripting via MySQL Version String third-party-advisory