{"id":"CVE-2026-73424","published":"2026-08-17T17:11:59Z","modified":"2026-08-18T14:49:18Z","title":"Astro: Unauthenticated path override in the @astrojs/vercel ISR function","vendor":"withastro","product":"astro","tier":"tail","description":{"text":"Astro is a web framework for content-driven websites. From 10.0.3 until 11.0.3, the Astro Vercel adapter in packages/integrations/vercel/src/serverless/entrypoint.ts accepts x_astro_path for the public /_isr function based only on the x-vercel-isr header, allowing unauthenticated GET requests to render routes protected only by Vercel edge path rules or split edge middleware. This issue is fixed in 11.0.3.","provenance":"source","from":"CVE.org"},"cvss":{"score":6.5,"severity":"MEDIUM","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.00384,"percentile":0.32339,"provenance":"source"},"cwes":[{"id":"CWE-441","name":"Unintended Proxy or Intermediary"},{"id":"CWE-862","name":"Missing Authorization"}],"references":[{"url":"https://github.com/withastro/astro/security/advisories/GHSA-x27w-589x-frm2","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/withastro/astro/pull/17370","tags":["x_refsource_MISC"]},{"url":"https://github.com/withastro/astro/commit/3a43cf0f3690a8e33cb30109bc5165611cf38fcd","tags":["x_refsource_MISC"]},{"url":"https://github.com/withastro/astro/releases/tag/@astrojs/vercel@11.0.3","tags":["x_refsource_MISC"]}],"priority":{"score":11.0,"factors":[{"name":"EPSS percentile","points":6.47},{"name":"CVSS severity","points":4.55}]},"vendorSlug":"withastro","affectedVersions":[{"vendor":"withastro","product":"astro","versions":[">= 10.0.3, < 11.0.3"]}],"affected":[{"ecosystem":"npm","package":"@astrojs/vercel","vulnerableRanges":[">=10.0.3, <11.0.3"],"patched":["11.0.3"],"from":["GHSA-x27w-589x-frm2"],"provenance":"source"}],"euvd":{"id":"EUVD-2026-60306","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-withastro-astro-cve-2025-29927","parents":[{"from":"CVE-2026-33768","to":"CVE-2026-73424","relation":"related","confidence":"high","kind":"lineage","evidence":[{"kind":"osv-related","provenance":"source","id":"GHSA-x27w-589x-frm2","via":"reference","url":"https://github.com/withastro/astro/security/advisories/GHSA-mr6q-rp88-fx84"},{"kind":"similar","provenance":"machine","score":0.45,"basis":"same product + CWE + description similarity"}]}]}}