Medium severity · published Oct 2, 2026
CVE-2026-94484
Next.js: Cache poisoning in Next.js SSG/ISR rendering leads to cross-user content substitution and persistent denial of service
4.8
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 16% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NE
next.js · vercel
>= 15.0.0, < 15.5.27; >= 16.0.0, < 16.3.8 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-94484
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-94484
x_refsource_CONFIRM
https://github.com/vercel/next.js/security/advisories/GHSA-mcj8-r9mp-w47p
x_refsource_MISC
https://github.com/vercel/next.js/commit/52c94abdd2ea5f416f5e8353ea8a2edd3fe311b8
x_refsource_MISC
https://github.com/vercel/next.js/commit/719e4c67d6e92df60246f95e1d96e2dd60789a52
x_refsource_MISC
https://github.com/vercel/next.js/releases/tag/v15.5.27
x_refsource_MISC
https://github.com/vercel/next.js/releases/tag/v16.3.8
More from next.js
10.0
CVE-2025-55182
Meta React Server Components Remote Code Execution Vulnerability
9.1
CVE-2025-29927
Next.js is a React framework for building full-stack web applications
9.0
CVE-2026-75604
Next.js: Unauthenticated Remote Code Execution on windows-hosted servers
8.6
CVE-2026-44578
Next.js: Server-side request forgery in applications using WebSocket upgrades
8.2
CVE-2026-94482
Next.js: Denial of Service in App Router using Server Actions