CVE-2026-64646

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 v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/vercel/next.js/commit/57c31f724d746e86a9e8b92aa8be538a922446a4	Patch
https://github.com/vercel/next.js/commit/9a4651e754f70b12e397694ffc41f44c3ba8cc17	Patch
https://github.com/vercel/next.js/releases/tag/v15.5.21	Product Release Notes
https://github.com/vercel/next.js/releases/tag/v16.2.11	Product Release Notes
https://github.com/vercel/next.js/security/advisories/GHSA-4c39-4ccg-62r3	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:vercel:next.js::::::node.js::*
	cpe:2.3:a:vercel:next.js::::::node.js::*

History

No history.

Information

Published : 2026-07-27 19:17

Updated : 2026-07-29 14:39

NVD link : CVE-2026-64646

Mitre link : CVE-2026-64646

CVE.ORG link : CVE-2026-64646

JSON object : View

Products Affected

vercel

next.js

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

{"id": "CVE-2026-64646", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-64646", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-27T20:22:07.853148Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}], "cvssMetricV40": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 6.3, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "vercel", "product": "next.js", "versions": [{"status": "affected", "version": ">= 13.0.0 < 15.5.21"}, {"status": "affected", "version": ">= 16.0.0, < 16.2.11"}]}]}], "published": "2026-07-27T19:17:21.477", "references": [{"url": "https://github.com/vercel/next.js/commit/57c31f724d746e86a9e8b92aa8be538a922446a4", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/vercel/next.js/commit/9a4651e754f70b12e397694ffc41f44c3ba8cc17", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/vercel/next.js/releases/tag/v15.5.21", "tags": ["Product", "Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/vercel/next.js/releases/tag/v16.2.11", "tags": ["Product", "Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/vercel/next.js/security/advisories/GHSA-4c39-4ccg-62r3", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-770"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-07-29T14:39:00.200", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "A35AD882-35BE-4B3B-8BBC-11ED8E8E1336", "versionEndExcluding": "15.5.21", "versionStartIncluding": "13.0.0"}, {"criteria": "cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "841758BF-9324-4127-B087-6A8C1BADB389", "versionEndExcluding": "16.2.11", "versionStartIncluding": "16.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}