{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-59727", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-07-06T15:34:16.917Z", "datePublished": "2026-07-27T19:42:32.222Z", "dateUpdated": "2026-07-28T15:20:18.915Z"}, "containers": {"cna": {"title": "Astro: Cross-site scripting via unescaped transition:* directive values on hydrated islands", "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "lang": "en", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-83", "lang": "en", "description": "CWE-83: Improper Neutralization of Script in Attributes in a Web Page", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-116", "lang": "en", "description": "CWE-116: Improper Encoding or Escaping of Output", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "subAvailabilityImpact": "NONE", "baseScore": 2.1, "baseSeverity": "LOW", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/withastro/astro/security/advisories/GHSA-7pw4-f3q4-r2p2", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/withastro/astro/security/advisories/GHSA-7pw4-f3q4-r2p2"}, {"name": "https://github.com/withastro/astro/pull/17212", "tags": ["x_refsource_MISC"], "url": "https://github.com/withastro/astro/pull/17212"}, {"name": "https://github.com/withastro/astro/commit/7ba0bb1dc7516e88caff9abd7767322af44b0294", "tags": ["x_refsource_MISC"], "url": "https://github.com/withastro/astro/commit/7ba0bb1dc7516e88caff9abd7767322af44b0294"}, {"name": "https://github.com/withastro/astro/releases/tag/astro@7.0.4", "tags": ["x_refsource_MISC"], "url": "https://github.com/withastro/astro/releases/tag/astro@7.0.4"}], "affected": [{"vendor": "withastro", "product": "astro", "versions": [{"version": ">= 3.10.0, < 7.0.4", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-27T19:42:32.222Z"}, "descriptions": [{"lang": "en", "value": "Astro is a web framework for content-driven websites. In versions 3.10.0 through 7.0.3, when a transition:persist, transition:scope, or transition:persist-props directive is applied to a client-hydrated (client:*) component, Astro copied the directive value onto the rendered <astro-island> element without HTML-escaping it. If a developer reflects attacker-controlled input into one of these directives, an attacker can break out of the attribute and inject arbitrary HTML/JavaScript into the server-rendered output, resulting in reflected cross-site scripting (XSS). Exploitation requires the application developer to have written a non-idiomatic pattern \u2014 passing untrusted, request-derived input directly into a transition directive. Astro applications that do not route untrusted input into these directives are unaffected. This issue has been fixed in version 7.0.4."}], "source": {"advisory": "GHSA-7pw4-f3q4-r2p2", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/withastro/astro/security/advisories/GHSA-7pw4-f3q4-r2p2", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-28T15:08:17.872331Z", "id": "CVE-2026-59727", "options": [{"Exploitation": "poc"}, {"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": "2026-07-28T15:20:18.915Z"}}]}}

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{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.10.0,7.0.4)"}}], "enrichment": {"confidence": 90.0, "confidence_source": "inferred", "scores": [{"score": 90.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "astro", "source": "cna", "vendor": "withastro"}, "product": "astro", "vendor": "withastro"}], "created": "2026-07-28T02:30:04.243927+00:00", "updated": "2026-07-28T14:45:17.085204+00:00", "vendors": ["withastro", "withastro$PRODUCT$astro"]}