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CVE-2026-49215

CVE-2026-49215 · Symfony UX: CSRF Protection Bypass in symfony/ux-live-component — Accept Header is CORS-Safelisted

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 2.1 · Low · EPSS 0.2% · Fix available

Published
Updated

Stack: php

Affected products and versions

  • ux

    Versions
    • >= 3.0.0, < 3.1.0: Affected
    • >= 2.22.0, < 2.36.0: Affected

    No fix published

  • symfony/ux-live-component Packagist

    Versions
    • v2.22.0
    • v2.22.1
    • v2.23.0
    • v2.24.0
    • v2.25.0
    • v2.25.1
    • v2.25.2
    • v2.26.0
    • v2.26.1
    • v2.27.0
    • v2.28.0
    • v2.28.1
    • v2.28.2
    • v2.29.0
    • v2.29.1
    • v2.29.2
    • v2.30.0
    • v2.31.0
    • v2.32.0
    • v2.33.0
    • v2.34.0
    • v2.35.0
    Affected ranges
    • ECOSYSTEM: ≥ 2.22.0, < 2.36.0

    Update to 2.36.0

  • symfony/ux-live-component Packagist

    Versions
    • v3.0.0
    Affected ranges
    • ECOSYSTEM: ≥ 3.0.0, < 3.1.0

    Update to 3.1.0

Original sources

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