CVE Explorer
CVE-2026-29057
Next.js is a React framework for building full-stack web applications. Starting in version 9.5.0 and prior to versions 15.5.13 and 16.1.7, when Next.js rewrites proxy traffic to an external backend, a crafted `DELETE`/`OPTIONS` request using `Transfer-Encoding: chunked` could trigger request boundary disagreement between the proxy and backend. This could allow request smuggling through rewritten routes. An attacker could smuggle a second request to unintended backend routes (for example, interna
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":">= 16.0.0-beta.0, < 16.1.7"},{"status":"affected","version":">= 9.5.0, < 15.5.13"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:c8defcf1e9154d9a69bafd3f5ae1471f53c6d1720cf3a97d090d086a9b517d26 · sha256:744afacb7e31b632… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6.3,"baseSeverity":"MEDIUM","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:L/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:c8defcf1e9154d9a69bafd3f5ae1471f53c6d1720cf3a97d090d086a9b517d26 · sha256:744afacb7e31b632… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-444","description":"CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:c8defcf1e9154d9a69bafd3f5ae1471f53c6d1720cf3a97d090d086a9b517d26 · sha256:744afacb7e31b632… · /containers/cna/problemTypes/0/descriptions/0
Source references
4 source assertions{"name":"https://github.com/vercel/next.js/commit/dc98c04f376c6a1df76ec3e0a2d07edf4abdabd6","tags":["x_refsource_MISC"],"url":"https://github.com/vercel/next.js/commit/dc98c04f376c6a1df76ec3e0a2d07edf4abdabd6"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:c8defcf1e9154d9a69bafd3f5ae1471f53c6d1720cf3a97d090d086a9b517d26 · sha256:744afacb7e31b632… · /containers/cna/references/1
{"name":"https://github.com/vercel/next.js/releases/tag/v15.5.13","tags":["x_refsource_MISC"],"url":"https://github.com/vercel/next.js/releases/tag/v15.5.13"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:c8defcf1e9154d9a69bafd3f5ae1471f53c6d1720cf3a97d090d086a9b517d26 · sha256:744afacb7e31b632… · /containers/cna/references/2
{"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_v5referenceurn:baitaphish:normalized-source-record:v2:c8defcf1e9154d9a69bafd3f5ae1471f53c6d1720cf3a97d090d086a9b517d26 · sha256:744afacb7e31b632… · /containers/cna/references/3
{"name":"https://github.com/vercel/next.js/security/advisories/GHSA-ggv3-7p47-pfv8","tags":["x_refsource_CONFIRM"],"url":"https://github.com/vercel/next.js/security/advisories/GHSA-ggv3-7p47-pfv8"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:c8defcf1e9154d9a69bafd3f5ae1471f53c6d1720cf3a97d090d086a9b517d26 · sha256:744afacb7e31b632… · /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.