CVE-2026-48761

Description

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>, <applet>, <iframe>, and <img>, and <meta http-equiv="refresh"> URLs inside content bypassed URL sanitization, allowing explicitly enabled elements or attributes to pass javascript: and similar payloads into sanitized output. This issue is fixed in versions 6.4.41, 7.4.13, and 8.0.13.

References

• https://github.com/symfony/symfony/commit/069a70f9f26e61e9de3b7f9a864a86ed24b36bd0
• https://github.com/symfony/symfony/releases/tag/v6.4.41
• https://github.com/symfony/symfony/releases/tag/v7.4.13
• https://github.com/symfony/symfony/releases/tag/v8.0.13
• https://github.com/symfony/symfony/security/advisories/GHSA-x5qj-865h-mgvm