CVE-2026-94484CWE-524

CVE-2026-94484

Medium · published October 2, 2026

CVSS v3.1
4.8
EPSS
0%
Percentile
14.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
CVSS v4.0
6.3 · 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
EPSS
0.00244 · 14.8th percentile
Weakness
CWE-524 · Use of Cache Containing Sensitive Information
Published
2026-10-02T20:16Z
Affected products (2)
ProductVersionsFixed in
vercel/next.js≥ 15.0.0, < 15.5.2715.5.27
vercel/next.js≥ 16.0.0, < 16.3.816.3.8
References (5)
https://github.com/vercel/next.js/commit/52c94abdd2ea5f416f5e8353ea8a2edd3fe311b8 · [email protected]https://github.com/vercel/next.js/commit/719e4c67d6e92df60246f95e1d96e2dd60789a52 · [email protected]https://github.com/vercel/next.js/releases/tag/v15.5.27 · [email protected]https://github.com/vercel/next.js/releases/tag/v16.3.8 · [email protected]https://github.com/vercel/next.js/security/advisories/GHSA-mcj8-r9mp-w47p · [email protected]
EPSS history
Timeline
  • 04 OCT 03:32Z
    EPSS moved — → 0%
    epss
  • 02 OCT 15:26Z
    Next.js: Cache poisoning in Next.js SSG/ISR rendering leads to cross-user content substitution and persistent denial of service
    cvelistv5