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CVE-2026-49215

LOW
2.1
CVSS 4.0
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.

Metadata

CVE ID
CVE-2026-49215
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-05-28 03:42 UTC
Published
2026-07-17 16:16 UTC
Last updated
2026-07-17 16:16 UTC
Primary CWE
CWE-352
CWE-352: Cross-Site Request Forgery (CSRF)
Vendor / Product
symfony / ux
Sources
cve.org  ·  NVD

Severity & Metrics

2.1 LOW CVSS 4.0
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
Affected products (1)
VendorProductPlatformVersions
symfony ux — >= 3.0.0, < 3.1.0, >= 2.22.0, < 2.36.0
Weakness (CWE)
CWESourceDescription
CWE-352 cna CWE-352: Cross-Site Request Forgery (CSRF)
CVSS scores (1)
ScoreSeverityVersionSourceVector
2.1 LOW 4.0 cna 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
References (4)
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