{"action":"Upgrade astro to 5.15.8 or later.","affected":[{"fixed":"5.15.8","introduced":"0"}],"component":"astro","cve_ids":["CVE-2025-66202"],"ecosystem":"npm","epss":0.00314,"exploited":false,"fixed_versions":["5.15.8"],"ghsa_id":"GHSA-whqg-ppgf-wp8c","id":"tcs_01M5KGF6P46RBEMR53FWXHVND4","modified_at":"2026-02-04T02:27:12.689316Z","published_at":"2025-12-08T16:26:43Z","references":["https://osv.dev/vulnerability/GHSA-whqg-ppgf-wp8c","https://github.com/withastro/astro/security/advisories/GHSA-ggxq-hp9w-j794","https://github.com/withastro/astro/security/advisories/GHSA-whqg-ppgf-wp8c","https://nvd.nist.gov/vuln/detail/CVE-2025-64765","https://nvd.nist.gov/vuln/detail/CVE-2025-66202","https://github.com/withastro/astro/commit/6f800813516b07bbe12c666a92937525fddb58ce","https://github.com/withastro/astro"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"GHSA-whqg-ppgf-wp8c","url":"https://osv.dev/vulnerability/GHSA-whqg-ppgf-wp8c"}],"summary":"Astro has an Authentication Bypass via Double URL Encoding, a bypass for CVE-2025-64765"}