CVE-2026-45753

Description

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 6.1.0-BETA1 until 6.4.40, 7.4.12, and 8.0.12, UrlAttributeSanitizer::getSupportedAttributes() omits URL-valued attributes including action, formaction, poster, and cite, so configurations that admit those attributes can leave javascript: URIs unsanitized and enable XSS when the resulting HTML is rendered or a victim submits a form or clicks a button. This issue is fixed in versions 6.4.40, 7.4.12, and 8.0.12.

References

https://github.com/symfony/symfony/security/advisories/GHSA-hhg7-c65m-h7ff

https://github.com/symfony/symfony/releases/tag/v8.0.12

https://github.com/symfony/symfony/releases/tag/v7.4.12

https://github.com/symfony/symfony/releases/tag/v6.4.40

https://github.com/symfony/symfony/commit/487728e7e180a674a6d4c01bd0cb56161cc441b7

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4

EPSS