{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-126361","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-11-10T21:12:01.228Z","datePublished":"2026-11-12T22:26:35.206Z","dateUpdated":"2026-11-12T22:26:35.206Z"},"containers":{"cna":{"title":"Astro: XSS via attribute injection in dynamic tag names","problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-184","lang":"en","description":"CWE-184: Incomplete List of Disallowed Inputs","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW","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:L/VI:L/VA:N/SC:L/SI:L/SA:N","version":"4.0"}}],"references":[{"name":"https://github.com/withastro/astro/security/advisories/GHSA-mh32-jxcr-mh9f","tags":["x_refsource_CONFIRM"],"url":"https://github.com/withastro/astro/security/advisories/GHSA-mh32-jxcr-mh9f"},{"name":"https://github.com/withastro/astro/pull/18520","tags":["x_refsource_MISC"],"url":"https://github.com/withastro/astro/pull/18520"},{"name":"https://github.com/withastro/astro/commit/e023abac912d7cb6af2b9fb5107ef5dabc667096","tags":["x_refsource_MISC"],"url":"https://github.com/withastro/astro/commit/e023abac912d7cb6af2b9fb5107ef5dabc667096"},{"name":"https://github.com/withastro/astro/releases/tag/astro@7.4.5","tags":["x_refsource_MISC"],"url":"https://github.com/withastro/astro/releases/tag/astro@7.4.5"}],"affected":[{"vendor":"withastro","product":"astro","versions":[{"version":"< 7.4.5","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-11-12T22:26:35.206Z"},"descriptions":[{"lang":"en","value":"Astro is a web framework for content-driven websites. Prior to 7.4.5, Astro rendered a string used as a dynamic element name as raw HTML after applying an incomplete character filter. A / in the string could make an HTML parser treat the remainder as attributes, allowing untrusted element-name input to inject event-handler markup. The .astro dynamic-tag renderer, JSX renderer, and MDX renderer were affected, and exploitation required an application to use request-controlled or stored untrusted data as all or part of an element name. This issue is fixed in version 7.4.5."}],"source":{"advisory":"GHSA-mh32-jxcr-mh9f","discovery":"UNKNOWN"}}}}