{"schemaVersion":3,"id":"CVE-2026-29057","aliases":["CGA-234c-fcw4-789p","CGA-hvm2-mhfp-8p79","CGA-wc77-8xh7-pvmh","GHSA-ggv3-7p47-pfv8","CGA-3649-hvxp-2xqm","CGA-52hr-4mqj-hcm7","CGA-62gw-p93f-fqwx","CGA-9h9c-gfhh-q28q","CGA-9p8c-9jw9-fw54","CGA-c67x-gjrr-7v88","CGA-f89q-572g-qhmg","CGA-ghcx-3frr-qq69","CGA-gq6m-cpm7-v56f","CGA-h42m-74r6-c2p4","CGA-m64x-mm54-xc6r","CGA-m877-j2c2-8php","CGA-pxh2-p9r7-jxmc","CGA-wjrc-gwfg-f295"],"status":"published","duplicateOf":null,"title":null,"description":"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, internal/admin endpoints), bypassing assumptions that only the configured rewrite destination/path is reachable. This does not impact applications hosted on providers that handle rewrites at the CDN level, such as Vercel.  The vulnerability originated in an upstream library vendored by Next.js. It is fixed in Next.js 15.5.13 and 16.1.7 by updating that dependency’s behavior so `content-length: 0` is added only when both `content-length` and `transfer-encoding` are absent, and `transfer-encoding` is no longer removed in that code path. If upgrading is not immediately possible, block chunked `DELETE`/`OPTIONS` requests on rewritten routes at the edge/proxy, and/or enforce authentication/authorization on backend routes.","dates":{"published":"2026-03-18T00:30:27.738Z","modified":"2026-03-18T14:47:25.258Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.5,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":6.3,"severity":"medium","vector":"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","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"OSV · Wolfi","score":6.3,"severity":"medium","vector":"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","exploitability":null,"impact":null,"computed":true},{"version":"4.0","versionLabel":"v4.0","source":"OSV · Npm","score":6.3,"severity":"medium","vector":"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","exploitability":null,"impact":null,"computed":true},{"version":"4.0","versionLabel":"v4.0","source":"OSV · Chainguard","score":6.3,"severity":"medium","vector":"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","exploitability":null,"impact":null,"computed":true},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":6.3,"severity":"medium","vector":"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/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","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00546,"percentile":0.44919,"severity":"low","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":0.11899999999999993,"baselineDate":"2026-09-21T00:00:00.000Z","baselineScore":0.00427},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00546,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00546,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00546,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00546,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00546,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00546,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00546,"percentile":0.44919}],"last30":[{"date":"2026-09-21T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00525,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00546,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00546,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00546,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00546,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00546,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00546,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00546,"percentile":0.44919}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-444","name":"Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')","description":"The product acts as an intermediary HTTP agent\n         (such as a proxy or firewall) in the data flow between two\n         entities such as a client and server, but it does not\n         interpret malformed HTTP requests or responses in ways that\n         are consistent with how the messages will be processed by\n         those entities that are at the ultimate destination.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/444.html"}],"affected":[{"vendor":"chainguard","product":"cadence-web","name":"cadence-web","label":"cadence-web","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/cadence-web","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"chainguard","product":"jitsucom-jitsu-console","name":"jitsucom-jitsu-console","label":"jitsucom-jitsu-console","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/jitsucom-jitsu-console","purlType":"apk","versions":[{"text":"< 2.11.0-r17","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.11.0-r17","eol":null,"hubHref":null},{"vendor":"chainguard","product":"keep-ui","name":"keep-ui","label":"keep-ui","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/keep-ui","purlType":"apk","versions":[{"text":"< 0.51.0-r1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.51.0-r1","eol":null,"hubHref":null},{"vendor":"chainguard","product":"keep-ui-fips","name":"keep-ui-fips","label":"keep-ui-fips","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/keep-ui-fips","purlType":"apk","versions":[{"text":"< 0.51.0-r1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.51.0-r1","eol":null,"hubHref":null},{"vendor":"chainguard","product":"langfuse-2","name":"langfuse-2","label":"langfuse-2","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/langfuse-2","purlType":"apk","versions":[{"text":"< 2.95.12-r14","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.95.12-r14","eol":null,"hubHref":null},{"vendor":"chainguard","product":"langfuse-3","name":"langfuse-3","label":"langfuse-3","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/langfuse-3","purlType":"apk","versions":[{"text":"< 3.162.0-r0","noFixRecorded":false,"fixedIn":null},{"text":"< 3.162.0-r1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.162.0-r0 | < 3.162.0-r1","eol":null,"hubHref":null},{"vendor":"chainguard","product":"langfuse-fips-2","name":"langfuse-fips-2","label":"langfuse-fips-2","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/langfuse-fips-2","purlType":"apk","versions":[{"text":"< 2.95.12-r17","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.95.12-r17","eol":null,"hubHref":null},{"vendor":"chainguard","product":"langfuse-fips-3","name":"langfuse-fips-3","label":"langfuse-fips-3","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/langfuse-fips-3","purlType":"apk","versions":[{"text":"< 3.162.0-r0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.162.0-r0","eol":null,"hubHref":null},{"vendor":"chainguard","product":"langfuse-fips-3.152","name":"langfuse-fips-3.152","label":"langfuse-fips-3.152","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/langfuse-fips-3.152","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"wolfi","product":"jitsucom-jitsu-console","name":"jitsucom-jitsu-console","label":"jitsucom-jitsu-console","ecosystem":"Wolfi","cpePart":null,"purl":"pkg:apk/wolfi/jitsucom-jitsu-console","purlType":"apk","versions":[{"text":"< 2.11.0-r17","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.11.0-r17","eol":null,"hubHref":null},{"vendor":"wolfi","product":"langfuse-3","name":"langfuse-3","label":"langfuse-3","ecosystem":"Wolfi","cpePart":null,"purl":"pkg:apk/wolfi/langfuse-3","purlType":"apk","versions":[{"text":"< 3.162.0-r0","noFixRecorded":false,"fixedIn":null},{"text":"< 3.162.0-r1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.162.0-r0 | < 3.162.0-r1","eol":null,"hubHref":null},{"vendor":"Npm","product":"next","name":"next","label":"next","ecosystem":"Npm","cpePart":null,"purl":"pkg:npm/next","purlType":"npm","versions":[{"text":"≥ 16.0.0-beta.0, < 16.1.7","noFixRecorded":false,"fixedIn":null},{"text":"≥ 9.5.0, < 15.5.13","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 16.0.0-beta.0, < 16.1.7 | ≥ 9.5.0, < 15.5.13","eol":{"isEol":null,"eolDate":null,"matchMethod":"purl","cycle":null,"product":{"name":"nextjs","label":"Next.js","category":"framework"}},"hubHref":null},{"vendor":"vercel","product":"next.js","name":"next.js","label":"next.js","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 16.0.0-beta.0, < 16.1.7","noFixRecorded":false,"fixedIn":null},{"text":"≥ 9.5.0, < 15.5.13","noFixRecorded":false,"fixedIn":null},{"text":"≥ 16.0.0, < 16.1.7","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 16.0.0-beta.0, < 16.1.7 | ≥ 9.5.0, < 15.5.13 | ≥ 16.0.0, < 16.1.7","eol":null,"hubHref":"/vendor/vercel/nextjs"}],"affectedCount":13,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/vercel/next.js/security/advisories/GHSA-ggv3-7p47-pfv8","label":"github.com/vercel/next.js/security/advisories/GHSA-ggv3-7p47-pfv8","hostname":"github.com","tags":["X Refsource CONFIRM","Advisory","WEB","Mitigation","Vendor Advisory"]},{"url":"https://github.com/vercel/next.js/commit/dc98c04f376c6a1df76ec3e0a2d07edf4abdabd6","label":"github.com/vercel/next.js/commit/dc98c04f376c6a1df76ec3e0a2d07edf4abdabd6","hostname":"github.com","tags":["X Refsource MISC","FIX","WEB","Patch"]},{"url":"https://github.com/vercel/next.js/releases/tag/v15.5.13","label":"github.com/vercel/next.js/releases/tag/v15.5.13","hostname":"github.com","tags":["X Refsource MISC","WEB","Product","Release Notes"]},{"url":"https://github.com/vercel/next.js/releases/tag/v16.1.7","label":"github.com/vercel/next.js/releases/tag/v16.1.7","hostname":"github.com","tags":["X Refsource MISC","WEB","Product","Release Notes"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/29xxx/CVE-2026-29057.json","label":"github.com/CVEProject/cvelistV5/tree/main/cves/2026/29xxx/CVE-2026-29057.json","hostname":"github.com","tags":["Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-29057","label":"nvd.nist.gov/vuln/detail/CVE-2026-29057","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/vercel/next.js","label":"github.com/vercel/next.js","hostname":"github.com","tags":["PACKAGE"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":["CGA-W92Q-GHC3-3HJ2"]},"timeline":[{"kind":"published","date":"2026-03-18T00:30:27.738Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-03-18T14:47:25.258Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":26,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T23:15:38.441Z","stale":false,"partial":false}}