CVE-2026-56704

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.

CVSS Vector

References

• https://github.com/vrana/adminer/security/advisories/GHSA-h6jr-7pr6-grgj
• https://www.vulncheck.com/advisories/adminer-before-cross-site-scripting-via-mysql-version-string