MSRXCVE-2026-94484
CVE-2026-94484
Next.js: Cache poisoning in Next.js SSG/ISR rendering leads to cross-user content substitution and persistent denial of service
CVSS 4.0 · CNA · github.com
chance of exploitation in the next 30 days (EPSS; higher than 15% of CVEs)
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
Affected packages and fixed versions
| Package | Ecosystem | Fixed in |
|---|---|---|
| next | npm | 16.3.8, 15.5.27 |
Affected products
- vercel next.js: ≥ 15.0.0, < 15.5.27; ≥ 16.0.0, < 16.3.8
Weakness: CWE-524
Also known as: GHSA-mcj8-r9mp-w47p
5 references (advisories, patches, write-ups)
- https://github.com/vercel/next.js/commit/52c94abdd2ea5f416f5e8353ea8a2edd3fe311b8 · Patch
- https://github.com/vercel/next.js/commit/719e4c67d6e92df60246f95e1d96e2dd60789a52 · Patch
- https://github.com/vercel/next.js/releases/tag/v15.5.27 · Release Notes
- https://github.com/vercel/next.js/releases/tag/v16.3.8 · Release Notes
- https://github.com/vercel/next.js/security/advisories/GHSA-mcj8-r9mp-w47p · Vendor Advisory
Sources: NVD, CVE.org, OSV.dev, FIRST EPSS. Missing ones did not answer or have no record yet.