{"id":"EUVD-2026-38335","enisaUuid":"b94a91b4-983f-38ce-b68b-98d89b8faa89","description":"Astro is a web framework. Prior to 6.3.3, when a component uses a client:* directive, Astro inserts named slot content into a data-astro-template attribute without HTML escaping the slot name allowing an attacker to break out of the attribute context and inject arbitrary HTML, resulting in reflected XSS during SSR. This vulnerability is fixed in 6.3.3.","datePublished":"Jun 22, 2026, 5:31:56 PM","dateUpdated":"Jun 23, 2026, 2:11:04 PM","baseScore":7.1,"baseScoreVersion":"3.1","baseScoreVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N","references":"https://github.com/withastro/astro/security/advisories/GHSA-8hv8-536x-4wqp\n","aliases":"CVE-2026-50146\nGHSA-8hv8-536x-4wqp\n","assigner":"GitHub_M","epss":0.27,"enisaIdProduct":[{"id":"94eee603-03d2-3554-910a-456a174b8ee8","product":{"name":"astro","vendor":{"name":"withastro"}},"product_version":"\u003c 6.3.3"}],"enisaIdVendor":[{"id":"480ea574-5803-39fc-ac58-5ac84ebf0411","vendor":{"name":"withastro"}}],"enisaIdVulnerability":[{"id":"65529be7-d435-376b-b45f-c701fddf0ffc","vulnerability":{"id":"CVE-2026-50146","description":"Astro is a web framework. Prior to 6.3.3, when a component uses a client:* directive, Astro inserts named slot content into a data-astro-template attribute without HTML escaping the slot name allowing an attacker to break out of the attribute context and inject arbitrary HTML, resulting in reflected XSS during SSR. This vulnerability is fixed in 6.3.3.","datePublished":"Jun 22, 2026, 5:31:56 PM","dateUpdated":"Jun 23, 2026, 2:11:04 PM","status":"PUBLISHED","baseScore":7.1,"baseScoreVersion":"3.1","baseScoreVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N","references":"https://github.com/withastro/astro/security/advisories/GHSA-8hv8-536x-4wqp\n","enisa_id":"EUVD-2026-38335\n","assigner":"GitHub_M","epss":0.27,"dataProcessed":"Nov 1, 2026, 7:16:18 AM","vulnerabilityProduct":[{"id":"7c1c28d0-5e80-3ee6-ad85-5f5b3b3050d0","product":{"name":"astro","vendor":{"name":"withastro"}},"product_version":"\u003c 6.3.3"}],"vulnerabilityVendor":[{"id":"955e05c1-6b38-33ec-a374-02e02690d50c","vendor":{"name":"withastro"}}]}},{"id":"df447ba0-2619-30b6-98e1-2c4a35fab46d","vulnerability":{"id":"GHSA-8hv8-536x-4wqp","description":"Astro: Reflected XSS via unescaped slot name","datePublished":"Jun 16, 2026, 2:05:06 PM","dateUpdated":"Aug 12, 2026, 8:37:18 PM","baseScore":0.0,"references":"https://github.com/withastro/astro/security/advisories/GHSA-8hv8-536x-4wqp\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-50146\nhttps://github.com/withastro/astro\n","enisa_id":"EUVD-2026-38335\n","aliases":"CVE-2026-50146\nGHSA-8hv8-536x-4wqp\n","epss":0.0,"dataProcessed":"Nov 1, 2026, 2:01:46 AM","vulnerabilityProduct":[],"vulnerabilityVendor":[]}}],"enisaIdAdvisory":[]}