Unintended Proxy or Intermediary ('Confused Deputy') Affecting @astrojs/vercel package, versions <10.0.2
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-ASTROJSVERCEL-15763367
- published25 Mar 2026
- disclosed24 Mar 2026
- creditjp_soba
Introduced: 24 Mar 2026
CVE-2026-33768 (opens in a new tab)How to fix?
Upgrade @astrojs/vercel to version 10.0.2 or higher.
Overview
@astrojs/vercel is a Deploy your site to Vercel
Affected versions of this package are vulnerable to Unintended Proxy or Intermediary ('Confused Deputy') via the x-astro-path header or x_astro_path query parameter, which allows overriding internal request paths without authentication. An attacker can access restricted endpoints or bypass platform-level path restrictions by crafting requests that manipulate these parameters, potentially reaching sensitive routes such as /admin/* even when firewall rules are in place.
Note: This can only be executed when no src/middleware.ts is defined, or middleware is not using Edge mode.