CVE-2026-64646: CWE-770: Allocation of Resources Without Limits or Throttling in vercel next.js
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.
AI Analysis
Technical Summary
CVE-2026-64646 is a resource allocation vulnerability (CWE-770) in the Next.js React framework. Specifically, in versions 13.0.0 through 15.5.20 and 16.0.0 through 16.2.10, requests targeting Next.js applications that use the App Router with at least one Server Action executing on the Edge runtime can lead to excessive memory consumption. This can degrade application performance or cause denial of service due to resource exhaustion. The issue has been fixed in versions 15.5.21 and 16.2.11.
Potential Impact
Excessive memory consumption caused by this vulnerability can lead to degraded performance or denial of service in affected Next.js applications using Server Actions on the Edge runtime. There is no indication of privilege escalation, data disclosure, or code execution impacts.
Mitigation Recommendations
Upgrade affected Next.js versions to 15.5.21 or later, or 16.2.11 or later, where this vulnerability has been fixed. No other mitigations are indicated.
CVE-2026-64646: CWE-770: Allocation of Resources Without Limits or Throttling in vercel next.js
Description
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.
CVSS v4.0
Score 6.3medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-64646 is a resource allocation vulnerability (CWE-770) in the Next.js React framework. Specifically, in versions 13.0.0 through 15.5.20 and 16.0.0 through 16.2.10, requests targeting Next.js applications that use the App Router with at least one Server Action executing on the Edge runtime can lead to excessive memory consumption. This can degrade application performance or cause denial of service due to resource exhaustion. The issue has been fixed in versions 15.5.21 and 16.2.11.
Potential Impact
Excessive memory consumption caused by this vulnerability can lead to degraded performance or denial of service in affected Next.js applications using Server Actions on the Edge runtime. There is no indication of privilege escalation, data disclosure, or code execution impacts.
Mitigation Recommendations
Upgrade affected Next.js versions to 15.5.21 or later, or 16.2.11 or later, where this vulnerability has been fixed. No other mitigations are indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-4c39-4ccg-62r3
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-64646"]
- Ecosystems
- ["npm"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 4.0
Threat ID: 6a616bcd9c2644c7f80dbd99
Added to database: 07/23/2026, 01:18:05 UTC
Last enriched: 07/30/2026, 15:26:58 UTC
Last updated: 09/05/2026, 01:58:55 UTC
Views: 122
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