CVE-2026-94484
Medium
Description
Next.js is a React framework for building full-stack web applications. From 15.0.0 until 15.5.27 and 16.3.8, applications with a root-level catch-all page and statically generated or Incremental Static Regeneration routes can use a shared response cache key that is insufficiently scoped to the source route. A single unauthenticated crafted request can poison that cache, causing cross-user content substitution or persistent denial of service until the poisoned entry is revalidated or replaced. This issue is fixed in versions 15.5.27 and 16.3.8.
SeverityMedium
CVSS4.8
Exploit probability—
Product
Vercel Next.js
PublishedOct 2, 2026
First seenOct 2, 2026
Weakness typeCWE-524CWE-524
How to fix
Update
- vercel next.js15.5.27, 16.3.8 or later
- next16.3.8, 15.5.27 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| vercel next.js | 15.0.0 ≤ v < 15.5.27, 16.0.0 ≤ v < 16.3.8 | 15.5.27, 16.3.8 |
| nextnpm | 16.0.0 ≤ v < 16.3.8, 15.0.0 ≤ v < 15.5.27 | 16.3.8, 15.5.27 |
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