CVE-2026-45753: HtmlSanitizer UrlAttributeSanitizer Omits action/formaction/poster/cite: javascript: URI Survives Sanitization (XSS)

PKSA-q2wy-m7mz-kg58 CVE-2026-45753

Affected package: symfony/html-sanitizer

Affected version: >=6.1.0,<6.2.0|>=6.2.0,<6.3.0|>=6.3.0,<6.4.0|>=6.4.0,<6.4.40|>=7.0.0,<7.1.0|>=7.1.0,<7.2.0|>=7.2.0,<7.3.0|>=7.3.0,<7.4.0|>=7.4.0,<7.4.12|>=8.0.0,<8.0.12

Reported by:
FriendsOfPHP/security-advisories