Origin Validation Error Affecting @sveltejs/adapter-vercel package, versions <6.3.2
Threat Intelligence
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-SVELTEJSADAPTERVERCEL-15323114
- published20 Feb 2026
- disclosed19 Feb 2026
- creditElliott Johnson
Introduced: 19 Feb 2026
NewCVE-2026-27118 (opens in a new tab)How to fix?
Upgrade @sveltejs/adapter-vercel to version 6.3.2 or higher.
Overview
@sveltejs/adapter-vercel is an A SvelteKit adapter that creates a Vercel app
Affected versions of this package are vulnerable to Origin Validation Error via the __pathname query parameter. An attacker can cause sensitive user-specific responses to be cached and subsequently served to other users by tricking a victim into visiting a specially crafted link while authenticated.