CVE-2026-94484
Next.js: Cache poisoning in Next.js SSG/ISR rendering leads to cross-user content substitution and persistent denial of service
- State
- Published
- Severity
- 6.3 Medium
- Published
- Oct 2, 2026
- Updated
- Oct 5, 2026
- Reserved
- Sep 21, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.3 Medium | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N | GitHub_M |
Weaknesses
- CWE-524 Use of Cache Containing Sensitive Information
Affected Products
| Product | Versions |
|---|---|
next.jsvercel |
|
References
- https://github.com/vercel/next.js/security/advisories/GHSA-mcj8-r9mp-w47p
- https://github.com/vercel/next.js/commit/52c94abdd2ea5f416f5e8353ea8a2edd3fe311b8
- https://github.com/vercel/next.js/commit/719e4c67d6e92df60246f95e1d96e2dd60789a52
- https://github.com/vercel/next.js/releases/tag/v15.5.27
- https://github.com/vercel/next.js/releases/tag/v16.3.8
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