Auth bypass in Withastro Astro
CVE-2026-33768
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 deploym…
EPSS: 0.001 (15.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
Affected products
- Withastro Astro — versions < 10.0.2
Weakness classification (CWE)
References
- https://github.com/withastro/astro/security/advisories/GHSA-mr6q-rp88-fx84 (x_refsource_CONFIRM)
- https://github.com/withastro/astro/pull/15959 (x_refsource_MISC)
- https://github.com/withastro/astro/commit/335a204161f5a7293c128db570901d4f8639c6ed (x_refsource_MISC)
- https://github.com/withastro/astro/releases/tag/%40astrojs%2Fvercel%4010.0.2 (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-33768?
- CVE-2026-33768 is a medium-severity vulnerability in Withastro Astro, classified under Unintended Proxy or Intermediary (Confused Deputy). CVSS score: 6.5/10. Published 2026-03-24.
- How severe is CVE-2026-33768?
- Medium severity. CVSS v3 base score is 6.5 out of 10.