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TI-2026-46207 Aliases CVE-2026-64646GHSA-4c39-4ccg-62r3

Next.js: Unbounded Server Action payload in Edge runtime

Priority LOW 29CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
Partial Red Hat: 1 fixed, 1 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-770.

Summary

Next.js is a React framework for building full-stack web applications. In versions 13.0.0 through 15.5.20 and 16.0.0 through 16.2.10, requests targeting Next.js applications using App Router with at least one Server Action can lead to excessive memory consumption if that Server Actions uses the Edge runtime. This issue has been fixed in versions 15.5.21 and 16.2.11.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00524 44th percentileScored 2026-11-07
Fix Partial next.js (vercel): 16.2.11next (npm): 15.5.21, 16.2.11Red Hat: 1 advisoryRed Hat: 1 fixed, 1 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.js>= 13.0.0 < 15.5.21; 16.0.0 to before 16.2.1116.2.11Patch availableCNA
—next (npm)13.0.0 to before 15.5.2115.5.21Patch availableGHSA-4c39-4ccg-62r3
—next (npm)16.0.0 to before 16.2.1116.2.11Patch availableGHSA-4c39-4ccg-62r3
  • next.js Vendorvercel Affected >= 13.0.0 < 15.5.21; 16.0.0 to before 16.2.11 Fixed in 16.2.11 Patch available CNA
  • next (npm) Vendor— Affected 13.0.0 to before 15.5.21 Fixed in 15.5.21 Patch available GHSA-4c39-4ccg-62r3
  • next (npm) Vendor— Affected 16.0.0 to before 16.2.11 Fixed in 16.2.11 Patch available GHSA-4c39-4ccg-62r3

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:*13.0.0 to before 15.5.21; 16.0.0 to before 16.2.11Vulnerablevercel
  • cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:* Versions 13.0.0 to before 15.5.21; 16.0.0 to before 16.2.11 Vulnerable ·vercel

Remediation

  • Fix · CNA next.js (vercel) Fixed in 16.2.11
  • Fix · GHSA-4c39-4ccg-62r3 next (npm) Fixed in 15.5.21 Advisory →
  • Fix · GHSA-4c39-4ccg-62r3 next (npm) Fixed in 16.2.11 Advisory →

Red Hat 1 advisory

  • RHSA-2026:54435 Released 2026-08-12 · Red Hat rating Important
    Streams for Apache Kafka 3.2.1 release and security update
    • Streams for Apache Kafka 3.2.1

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux AI (RHEL AI) 3AffectedNo fix yet
Streams for Apache Kafka 3.2.1Fixed RHSA-2026:54435
Not affected: 6 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat Trusted Artifact Signer
  • streams for Apache Kafka 2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-64646
  2. 2026-10-03 Alias added: GHSA-4c39-4ccg-62r3
  3. 2026-11-03 Affected versions changed · Red Hat

References

Patch 2

Advisory 1

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