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TI-2026-65938 Aliases CVE-2026-94484GHSA-mcj8-r9mp-w47p

Next.js: Cache poisoning in Next.js SSG/ISR rendering leads to cross-user content…

Priority LOW 28CWE-524Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
None · None · Low
Fix status
Partial Red Hat: 6 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00244 15th percentileScored 2026-11-07
Fix Partial next.js (vercel): 15.5.27, 16.3.8next (npm): 16.3.8, 15.5.27Red Hat: 6 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
vercelnext.js15.0.0 to before 15.5.27; 16.0.0 to before 16.3.815.5.27, 16.3.8Patch availableCNA
—next (npm)16.0.0 to before 16.3.816.3.8Patch availableGHSA-mcj8-r9mp-w47p
—next (npm)15.0.0 to before 15.5.2715.5.27Patch availableGHSA-mcj8-r9mp-w47p
  • next.js Vendorvercel Affected 15.0.0 to before 15.5.27; 16.0.0 to before 16.3.8 Fixed in 15.5.27, 16.3.8 Patch available CNA
  • next (npm) Vendor— Affected 16.0.0 to before 16.3.8 Fixed in 16.3.8 Patch available GHSA-mcj8-r9mp-w47p
  • next (npm) Vendor— Affected 15.0.0 to before 15.5.27 Fixed in 15.5.27 Patch available GHSA-mcj8-r9mp-w47p

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:*15.0.0 to before 15.5.27; 16.0.0 to before 16.3.8Vulnerablevercel
  • cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:* Versions 15.0.0 to before 15.5.27; 16.0.0 to before 16.3.8 Vulnerable ·vercel

Remediation

  • Fix · CNA next.js (vercel) Fixed in 15.5.27, 16.3.8
  • Fix · GHSA-mcj8-r9mp-w47p next (npm) Fixed in 16.3.8 Advisory →
  • Fix · GHSA-mcj8-r9mp-w47p next (npm) Fixed in 15.5.27 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 7AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux AI (RHEL AI) 3AffectedNo fix yet: Fix deferred
Red Hat Trusted Artifact SignerAffectedNo fix planned: Out of support scope

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-94484
  2. 2026-10-04 Priority changed: MEDIUM → LOW
  3. 2026-10-05 CVSS score added · NVD
  4. 2026-10-06 CISA SSVC decision points changed
  5. 2026-10-07 Alias added: GHSA-mcj8-r9mp-w47p
  6. 2026-10-07 Fix available: npm/[email protected], npm/[email protected] · GHSA-mcj8-r9mp-w47p
  7. 2026-10-07 CVSS score added · GHSA-mcj8-r9mp-w47p
  8. 2026-10-07 Weakness changed · GHSA-mcj8-r9mp-w47p
  9. 2026-10-07 7 new references · GHSA-mcj8-r9mp-w47p

References

Patch 2

Advisory 2

Other 3

  • TI-2025-34861 Deserialization of untrusted data in Meta react-server-dom-webpack KEVCVSS 3.1CRITICAL 10.0
  • TI-2025-21309 Authorization Bypass in Next.js Middleware CVSS 3.1CRITICAL 9.1
  • TI-2025-34863 Deserialization of untrusted data in Meta react-server-dom-webpack CVSS 3.1HIGH 7.5
  • TI-2024-31371 Cache Poisoning in next.js CVSS 3.1HIGH 7.5
  • TI-2023-24914 Next.js before 13.4.20-canary.13 lacks a cache-control header and thus empty prefetch… CVSS 3.1HIGH 7.5
  • TI-2026-32490 Next.js: Server-side request forgery in applications using WebSocket upgrades CVSS 3.1HIGH 8.6
See all 62 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences