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CVE-2026-64641

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, crafted requests targeting Next.js applications using App Router with at least one Server Action can lead to excessive CPU usage blocking processing of further requests in the same process. This issue has been fixed in versions 15.5.21 and 16.2.11.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:cf17aedc843969025ce5b90f24214b8db249f594cf83039b30439b4c6a89a890
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"next.js","vendor":"vercel","versions":[{"status":"affected","version":">= 13.0.0, < 15.5.21"},{"status":"affected","version":">= 16.0.0, < 16.2.11"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:6ebed7f9d5580044b9234b3716c2d97312380f0117a427f0a8055ab544138246 · sha256:3444bbd05b4c8401… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":8.2,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6ebed7f9d5580044b9234b3716c2d97312380f0117a427f0a8055ab544138246 · sha256:3444bbd05b4c8401… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-834","description":"CWE-834: Excessive Iteration","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6ebed7f9d5580044b9234b3716c2d97312380f0117a427f0a8055ab544138246 · sha256:3444bbd05b4c8401… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"name":"https://github.com/vercel/next.js/commit/019628571641dec57aaf349ba0c360e3964e6f12","tags":["x_refsource_MISC"],"url":"https://github.com/vercel/next.js/commit/019628571641dec57aaf349ba0c360e3964e6f12"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6ebed7f9d5580044b9234b3716c2d97312380f0117a427f0a8055ab544138246 · sha256:3444bbd05b4c8401… · /containers/cna/references/2
{"name":"https://github.com/vercel/next.js/pull/96013","tags":["x_refsource_MISC"],"url":"https://github.com/vercel/next.js/pull/96013"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6ebed7f9d5580044b9234b3716c2d97312380f0117a427f0a8055ab544138246 · sha256:3444bbd05b4c8401… · /containers/cna/references/1
{"name":"https://github.com/vercel/next.js/releases/tag/v15.5.21","tags":["x_refsource_MISC"],"url":"https://github.com/vercel/next.js/releases/tag/v15.5.21"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6ebed7f9d5580044b9234b3716c2d97312380f0117a427f0a8055ab544138246 · sha256:3444bbd05b4c8401… · /containers/cna/references/3
{"name":"https://github.com/vercel/next.js/releases/tag/v16.2.11","tags":["x_refsource_MISC"],"url":"https://github.com/vercel/next.js/releases/tag/v16.2.11"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6ebed7f9d5580044b9234b3716c2d97312380f0117a427f0a8055ab544138246 · sha256:3444bbd05b4c8401… · /containers/cna/references/4
{"name":"https://github.com/vercel/next.js/security/advisories/GHSA-m99w-x7hq-7vfj","tags":["x_refsource_CONFIRM"],"url":"https://github.com/vercel/next.js/security/advisories/GHSA-m99w-x7hq-7vfj"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6ebed7f9d5580044b9234b3716c2d97312380f0117a427f0a8055ab544138246 · sha256:3444bbd05b4c8401… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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