{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-49210", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-28T03:42:34.340Z", "datePublished": "2026-07-17T16:09:17.850Z", "dateUpdated": "2026-07-17T16:52:59.836Z"}, "containers": {"cna": {"title": "Symfony UX: XSS in symfony/ux-live-component via attacker-controlled child component tag", "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "lang": "en", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "subAvailabilityImpact": "NONE", "baseScore": 2.3, "baseSeverity": "LOW", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/symfony/ux/security/advisories/GHSA-38x5-rcv4-xf7x", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/symfony/ux/security/advisories/GHSA-38x5-rcv4-xf7x"}, {"name": "https://github.com/symfony/ux/commit/fbc5e9a1bda7e4556be21bb1d970f382760ed9a9", "tags": ["x_refsource_MISC"], "url": "https://github.com/symfony/ux/commit/fbc5e9a1bda7e4556be21bb1d970f382760ed9a9"}, {"name": "https://github.com/symfony/ux/releases/tag/v2.36.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/symfony/ux/releases/tag/v2.36.0"}, {"name": "https://github.com/symfony/ux/releases/tag/v3.1.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/symfony/ux/releases/tag/v3.1.0"}], "affected": [{"vendor": "symfony", "product": "ux", "versions": [{"version": ">= 3.0.0, < 3.1.0", "status": "affected"}, {"version": ">= 2.8.0, < 2.36.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-17T16:09:59.645Z"}, "descriptions": [{"lang": "en", "value": "Symfony UX is a JavaScript ecosystem for Symfony. From 2.8.0 until 2.36.0 and 3.1.0, Symfony\\UX\\LiveComponent\\Util\\ChildComponentPartialRenderer::createHtml() interpolates the client-controlled children[id].tag value from LiveComponentSubscriber and InterceptChildComponentRenderSubscriber directly into HTML as a tag name without escaping or validation, allowing arbitrary HTML, including <script> tags, on any Live Component re-render that contains at least one child component. This issue is fixed in versions 2.36.0 and 3.1.0."}], "source": {"advisory": "GHSA-38x5-rcv4-xf7x", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-17T16:52:49.114369Z", "id": "CVE-2026-49210", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-17T16:52:59.836Z"}}]}}

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