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CVE-2026-27979

Next.js is a React framework for building full-stack web applications. Starting in version 16.0.1 and prior to version 16.1.7, a request containing the `next-resume: 1` header (corresponding with a PPR resume request) would buffer request bodies without consistently enforcing `maxPostponedStateSize` in certain setups. The previous mitigation protected minimal-mode deployments, but equivalent non-minimal deployments remained vulnerable to the same unbounded postponed resume-body buffering behavio
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:b8c9423548f9cac3d34a65714d6fe7c457b0f55fe98d20eff6fbb4f8e41bd484
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":">= 16.0.1, < 16.1.7"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ed72cf18469c5c2035bf48f422de3ec87d28d1b08478a4ef9a09e92c24dacb33 · sha256:2bb95f945f443f2a… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.9,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ed72cf18469c5c2035bf48f422de3ec87d28d1b08478a4ef9a09e92c24dacb33 · sha256:2bb95f945f443f2a… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-770","description":"CWE-770: Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ed72cf18469c5c2035bf48f422de3ec87d28d1b08478a4ef9a09e92c24dacb33 · sha256:2bb95f945f443f2a… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/vercel/next.js/commit/c885d4825f800dd1e49ead37274dcd08cdd6f3f1","tags":["x_refsource_MISC"],"url":"https://github.com/vercel/next.js/commit/c885d4825f800dd1e49ead37274dcd08cdd6f3f1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ed72cf18469c5c2035bf48f422de3ec87d28d1b08478a4ef9a09e92c24dacb33 · sha256:2bb95f945f443f2a… · /containers/cna/references/1
{"name":"https://github.com/vercel/next.js/releases/tag/v16.1.7","tags":["x_refsource_MISC"],"url":"https://github.com/vercel/next.js/releases/tag/v16.1.7"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ed72cf18469c5c2035bf48f422de3ec87d28d1b08478a4ef9a09e92c24dacb33 · sha256:2bb95f945f443f2a… · /containers/cna/references/2
{"name":"https://github.com/vercel/next.js/security/advisories/GHSA-h27x-g6w4-24gq","tags":["x_refsource_CONFIRM"],"url":"https://github.com/vercel/next.js/security/advisories/GHSA-h27x-g6w4-24gq"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ed72cf18469c5c2035bf48f422de3ec87d28d1b08478a4ef9a09e92c24dacb33 · sha256:2bb95f945f443f2a… · /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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