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symfony CVE debriefs

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MEDIUM symfony CVE published 2026-07-08

CVE-2026-55877

A cross-site scripting vulnerability exists in Symfony UX, a JavaScript ecosystem for Symfony. The vulnerability affects versions 2.17.0 before 2.36.1 and 3.0.0 before 3.2.0. The ux_icon() Twig function is marked as 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 hand [truncated]