XSS in Symfony Html-sanitizer

CVE-2026-48761

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 6.1.0 until 6.4.41, 7.4.13, and 8.0.13, UrlAttributeSanitizer::getSupportedAttributes() omitted URL-bearing attributes on <object>, <app…

Vulnerability class: XSS (Cross-Site Scripting)

Affected products

  • Symfony Html-sanitizer — versions >= 6.1.0, < 6.4.41, >= 7.0.0-BETA1, < 7.4.13, >= 8.0.0-BETA1, < 8.0.13
  • Symfony — versions >= 6.1.0, < 6.4.41, >= 7.0.0-BETA1, < 7.4.13, >= 8.0.0-BETA1, < 8.0.13

Weakness classification (CWE)

References