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VULNERABILITIES

CVE-2026-49215 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.4 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/symfony/ux/commit/aed7493db2b4b7bf1f9c79b33cda544f06904b27 [email protected]Patch
https://github.com/symfony/ux/releases/tag/v2.36.0 [email protected]Release Notes
https://github.com/symfony/ux/releases/tag/v3.1.0 [email protected]Release Notes
https://github.com/symfony/ux/security/advisories/GHSA-4m4j-hmqq-3gxm [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-352Cross-Site Request Forgery (CSRF)[email protected]

Affected Products

ProductVersions
symfony ux
>= 2.22.0, < 2.36.0
3.0.0

CPE

  • cpe:2.3:a:symfony:ux:*:*:*:*:*:*:*:*
  • cpe:2.3:a:symfony:ux:3.0.0:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-49215
NVD Published Date:
Jul 17, 2026
NVD Last Modified:
Jul 20, 2026
Source:
[email protected]
CVE-2026-49215 Details - Not Deferred