CVE-2026-55877

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.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/symfony/ux/commit/3a4964ec3700f0af4e13f7bfbf8bb3174c3e79d1	Patch
https://github.com/symfony/ux/releases/tag/v2.36.1	Release Notes
https://github.com/symfony/ux/releases/tag/v3.2.0	Release Notes
https://github.com/symfony/ux/security/advisories/GHSA-6v8j-33hc-mv84	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:symfony:ux::::::::
	cpe:2.3:a:symfony:ux::::::::

History

25 Oct 2026, 17:10

Type	Values Removed	Values Added
Summary		(es) Symfony UX es un ecosistema JavaScript para Symfony. Desde 2.17.0 antes de 2.36.1 y desde 3.0.0 antes de 3.2.0, la función Twig ux_icon() está marcada como is_safe=[’html’] e Icon::toHtml() inserta el código fuente SVG textualmente, permitiendo que archivos SVG locales no saneados o respuestas de cuerpo JSON bajo demanda de Iconify que contengan elementos de script anidados, manejadores de eventos on, o esquemas de URL peligrosos ejecuten cross-site scripting. Este problema está solucionado en las versiones 2.36.1 y 3.2.0.

Information

Published : 2026-07-08 22:17

Updated : 2026-10-25 17:10

NVD link : CVE-2026-55877

Mitre link : CVE-2026-55877

CVE.ORG link : CVE-2026-55877

JSON object : View

Products Affected

symfony

ux

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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