CVE-2026-48761
Symfony: HtmlSanitizer UrlAttributeSanitizer Misses URL Attributes on <object>, <applet>, <iframe>, <img> and the URL Inside <meta http-equiv="refresh"> content
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-79 CWE-1023 |
| Vendor | symfony |
| Product | symfony |
| Published | Jul 14, 2026 |
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Affected Versions
symfony / symfony
>= 6.1.0, < 6.4.41 >= 7.0.0-BETA1, < 7.4.13 >= 8.0.0-BETA1, < 8.0.13
symfony / html-sanitizer
>= 6.1.0, < 6.4.41 >= 7.0.0-BETA1, < 7.4.13 >= 8.0.0-BETA1, < 8.0.13
References
github.com: https://github.com/symfony/symfony/security/advisories/GHSA-x5qj-865h-mgvm github.com: https://github.com/symfony/symfony/commit/069a70f9f26e61e9de3b7f9a864a86ed24b36bd0 github.com: https://github.com/symfony/symfony/releases/tag/v6.4.41 github.com: https://github.com/symfony/symfony/releases/tag/v7.4.13 github.com: https://github.com/symfony/symfony/releases/tag/v8.0.13