{"id":"CVE-2026-49215","state":"PUBLISHED","title":"Symfony UX: CSRF Protection Bypass in symfony/ux-live-component — Accept Header is CORS-Safelisted","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.","publishedAt":"2026-07-17T16:16:42.126Z","updatedAt":"2026-07-17T18:05:15.930Z","severity":{"score":2.1,"label":"Low","version":"4.0","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","source":"GitHub_M"},"assigner":"GitHub_M","products":["symfony ux"],"affected":[{"vendor":"symfony","product":"ux","versions":[{"version":">= 3.0.0, < 3.1.0","status":"affected"},{"version":">= 2.22.0, < 2.36.0","status":"affected"}]}],"references":["https://github.com/symfony/ux/security/advisories/GHSA-4m4j-hmqq-3gxm","https://github.com/symfony/ux/commit/aed7493db2b4b7bf1f9c79b33cda544f06904b27","https://github.com/symfony/ux/releases/tag/v2.36.0","https://github.com/symfony/ux/releases/tag/v3.1.0"],"weaknesses":["CWE-352"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/49xxx/CVE-2026-49215.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-49215","state":"PUBLISHED","datePublished":"2026-07-17T16:16:42.126Z","dateUpdated":"2026-07-17T18:05:15.930Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-05-28T03:42:34.341Z"},"containers":{"cna":{"title":"Symfony UX: CSRF Protection Bypass in symfony/ux-live-component — Accept Header is CORS-Safelisted","descriptions":[{"lang":"en","value":"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":[{"vendor":"symfony","product":"ux","versions":[{"version":">= 3.0.0, < 3.1.0","status":"affected"},{"version":">= 2.22.0, < 2.36.0","status":"affected"}]}],"references":[{"url":"https://github.com/symfony/ux/security/advisories/GHSA-4m4j-hmqq-3gxm","name":"https://github.com/symfony/ux/security/advisories/GHSA-4m4j-hmqq-3gxm","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/symfony/ux/commit/aed7493db2b4b7bf1f9c79b33cda544f06904b27","name":"https://github.com/symfony/ux/commit/aed7493db2b4b7bf1f9c79b33cda544f06904b27","tags":["x_refsource_MISC"]},{"url":"https://github.com/symfony/ux/releases/tag/v2.36.0","name":"https://github.com/symfony/ux/releases/tag/v2.36.0","tags":["x_refsource_MISC"]},{"url":"https://github.com/symfony/ux/releases/tag/v3.1.0","name":"https://github.com/symfony/ux/releases/tag/v3.1.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"ACTIVE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":2.1,"baseSeverity":"LOW","vectorString":"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-352","lang":"en","description":"CWE-352: Cross-Site Request Forgery (CSRF)","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-17T16:16:42.126Z"},"source":{"advisory":"GHSA-4m4j-hmqq-3gxm","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-17T17:24:08.463081Z","id":"CVE-2026-49215","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-17T18:05:15.930Z"}}]}}}