Security Advisory

CVE-2026-49215

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-17 16:16:42

Last updated 2026-07-17 18:05:15

Assigner GitHub_M

CVSS score 2.1

State PUBLISHED

Description

Symfony UX is a JavaScript ecosystem for Symfony. From 2.22.0 until 2.36.0 and 3.1.0, Symfony\UX\LiveComponent\EventListener\LiveComponentSubscriber::isLiveComponentRequest() gates #[LiveAction] invocations on Accept: application/vnd.live-component+html, but the Accept header is CORS-safelisted and cross-origin fetch() can set it without preflight, allowing forged cross-origin #[LiveAction] requests against a victim session when applications use SameSite=None, credentials: 'include', a permissive cookie policy, or a same-origin pivot. This issue is fixed in versions 2.36.0 and 3.1.0.

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