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CVE Vulnerability Details :
CVE-2026-49215
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-17 Jul, 2026 | 16:16
Updated At-17 Jul, 2026 | 18:05
Rejected At-
▼CVE Numbering Authority (CNA)
Symfony UX: CSRF Protection Bypass in symfony/ux-live-component — Accept Header is CORS-Safelisted

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.

Affected Products
Vendor
symfony
Product
ux
Versions
Affected
  • >= 3.0.0, < 3.1.0
  • >= 2.22.0, < 2.36.0
Problem Types
TypeCWE IDDescription
CWECWE-352CWE-352: Cross-Site Request Forgery (CSRF)
Type: CWE
CWE ID: CWE-352
Description: CWE-352: Cross-Site Request Forgery (CSRF)
Metrics
VersionBase scoreBase severityVector
4.02.1LOW
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Version: 4.0
Base score: 2.1
Base severity: LOW
Vector:
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/symfony/ux/security/advisories/GHSA-4m4j-hmqq-3gxm
x_refsource_CONFIRM
https://github.com/symfony/ux/commit/aed7493db2b4b7bf1f9c79b33cda544f06904b27
x_refsource_MISC
https://github.com/symfony/ux/releases/tag/v2.36.0
x_refsource_MISC
https://github.com/symfony/ux/releases/tag/v3.1.0
x_refsource_MISC
Hyperlink: https://github.com/symfony/ux/security/advisories/GHSA-4m4j-hmqq-3gxm
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/symfony/ux/commit/aed7493db2b4b7bf1f9c79b33cda544f06904b27
Resource:
x_refsource_MISC
Hyperlink: https://github.com/symfony/ux/releases/tag/v2.36.0
Resource:
x_refsource_MISC
Hyperlink: https://github.com/symfony/ux/releases/tag/v3.1.0
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found