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.
References
| Link | Resource |
|---|---|
| https://github.com/symfony/ux/commit/aed7493db2b4b7bf1f9c79b33cda544f06904b27 | Patch |
| https://github.com/symfony/ux/releases/tag/v2.36.0 | Release Notes |
| https://github.com/symfony/ux/releases/tag/v3.1.0 | Release Notes |
| https://github.com/symfony/ux/security/advisories/GHSA-4m4j-hmqq-3gxm | Vendor Advisory |
Configurations
Configuration 1 (hide)
|
History
20 Jul 2026, 16:54
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/symfony/ux/commit/aed7493db2b4b7bf1f9c79b33cda544f06904b27 - Patch | |
| References | () https://github.com/symfony/ux/releases/tag/v2.36.0 - Release Notes | |
| References | () https://github.com/symfony/ux/releases/tag/v3.1.0 - Release Notes | |
| References | () https://github.com/symfony/ux/security/advisories/GHSA-4m4j-hmqq-3gxm - Vendor Advisory | |
| First Time |
Symfony
Symfony ux |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.4 |
| CPE | cpe:2.3:a:symfony:ux:3.0.0:*:*:*:*:*:*:* cpe:2.3:a:symfony:ux:*:*:*:*:*:*:*:* |
17 Jul 2026, 17:17
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-07-17 17:17
Updated : 2026-07-20 16:54
NVD link : CVE-2026-49215
Mitre link : CVE-2026-49215
CVE.ORG link : CVE-2026-49215
JSON object : View
Products Affected
symfony
- ux
CWE
CWE-352
Cross-Site Request Forgery (CSRF)