{"id":"CVE-2026-33768","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-33768","generatedAt":"2026-10-28T11:54:44.062Z","title":"On deployments without Edge Middleware, this lets anyone bypass Vercel's platform-level path restrictions entirely.","description":"Astro is a web framework. Prior to version 10.0.2, the @astrojs/vercel serverless entrypoint reads the x-astro-path header and x_astro_path query parameter to rewrite the internal request path, with no authentication whatsoever. On deployments without Edge Middleware, this lets anyone bypass Vercel's platform-level path restrictions entirely. The override preserves the original HTTP method and body, so this isn't limited to GET. POST, PUT, DELETE all land on the rewritten path. A Firewall rule blocking /admin/* does nothing when the request comes in as POST /api/health?x_astro_path=/admin/delete-user. This issue has been patched in version 10.0.2.","published":"2026-03-24T19:16:56.000Z","lastModified":"2026-06-17T10:38:04.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":9.1,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"},"cwe":["CWE-441","CWE-862"],"affected":["astro/\\@astrojs\\/vercel"],"epss":{"score":0.00344,"percentile":0.27718,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.34%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/withastro/astro/commit/335a204161f5a7293c128db570901d4f8639c6ed","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/withastro/astro/pull/15959","tags":["Issue Tracking"],"source":"security-advisories@github.com"},{"url":"https://github.com/withastro/astro/releases/tag/%40astrojs%2Fvercel%4010.0.2","tags":["Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/withastro/astro/security/advisories/GHSA-mr6q-rp88-fx84","tags":["Exploit","Vendor Advisory"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-33768","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}