CVE-2026-55877 – Symfony UX: XSS in symfony/ux-icons via unsanitized SVG content in local files and Iconify on-demand responses

CVE ID :CVE-2026-55877

Published : July 8, 2026, 9:32 p.m. | 16 minutes ago

Description :Symfony UX is a JavaScript ecosystem for Symfony. From 2.17.0 before 2.36.1 and from 3.0.0 before 3.2.0, the ux_icon() Twig function is marked is_safe=[‘html’] and Icon::toHtml() inlines SVG source verbatim, allowing unsanitized local SVG files or Iconify on-demand JSON body responses containing nested script elements, on* event handlers, or dangerous URL schemes to execute cross-site scripting. This issue is fixed in versions 2.36.1 and 3.2.0.

Severity: 0.0 | NA

Visit the link for more details, such as CVSS details, affected products, timeline, and more…