{"api_version":"1","generated_at":"2026-05-13T21:39:23+00:00","cve":"CVE-2026-45109","urls":{"html":"https://cve.report/CVE-2026-45109","api":"https://cve.report/api/cve/CVE-2026-45109.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-45109","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-45109"},"summary":{"title":"Next.js: Middleware / Proxy bypass in App Router applications via segment-prefetch routes","description":"Next.js is a React framework for building full-stack web applications. From 15.2.0 to before 15.5.18 and 16.2.6, it was found that the fix addressing CVE-2026-44575 did not apply to middleware.ts with Turbopack. This vulnerability is fixed in 15.5.18 and 16.2.6.","state":"PUBLISHED","assigner":"GitHub_M","published_at":"2026-05-13 18:16:19","updated_at":"2026-05-13 18:17:16"},"problem_types":["CWE-288","CWE-288 CWE-288: Authentication Bypass Using an Alternate Path or Channel"],"metrics":[{"version":"3.1","source":"security-advisories@github.com","type":"Secondary","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"}}],"references":[{"url":"https://github.com/vercel/next.js/security/advisories/GHSA-26hh-7cqf-hhc6","name":"https://github.com/vercel/next.js/security/advisories/GHSA-26hh-7cqf-hhc6","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-45109","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45109","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"vercel","product":"next.js","version":"affected >= 15.2.0, < 15.5.17","platforms":[]},{"source":"CNA","vendor":"vercel","product":"next.js","version":"affected >= 16.0.0, < 16.2.6","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"product":"next.js","vendor":"vercel","versions":[{"status":"affected","version":">= 15.2.0, < 15.5.17"},{"status":"affected","version":">= 16.0.0, < 16.2.6"}]}],"descriptions":[{"lang":"en","value":"Next.js is a React framework for building full-stack web applications. From 15.2.0 to before 15.5.18 and 16.2.6, it was found that the fix addressing CVE-2026-44575 did not apply to middleware.ts with Turbopack. This vulnerability is fixed in 15.5.18 and 16.2.6."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-288","description":"CWE-288: Authentication Bypass Using an Alternate Path or Channel","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-05-13T17:11:07.275Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M"},"references":[{"name":"https://github.com/vercel/next.js/security/advisories/GHSA-26hh-7cqf-hhc6","tags":["x_refsource_CONFIRM"],"url":"https://github.com/vercel/next.js/security/advisories/GHSA-26hh-7cqf-hhc6"}],"source":{"advisory":"GHSA-26hh-7cqf-hhc6","discovery":"UNKNOWN"},"title":"Next.js: Middleware / Proxy bypass in App Router applications via segment-prefetch routes"}},"cveMetadata":{"assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","cveId":"CVE-2026-45109","datePublished":"2026-05-13T17:11:07.275Z","dateReserved":"2026-05-08T19:27:26.699Z","dateUpdated":"2026-05-13T17:11:07.275Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-13 18:16:19","lastModifiedDate":"2026-05-13 18:17:16","problem_types":["CWE-288","CWE-288 CWE-288: Authentication Bypass Using an Alternate Path or Channel"],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":3.6}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"45109","Ordinal":"1","Title":"Next.js: Middleware / Proxy bypass in App Router applications vi","CVE":"CVE-2026-45109","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"45109","Ordinal":"1","NoteData":"Next.js is a React framework for building full-stack web applications. From 15.2.0 to before 15.5.18 and 16.2.6, it was found that the fix addressing CVE-2026-44575 did not apply to middleware.ts with Turbopack. This vulnerability is fixed in 15.5.18 and 16.2.6.","Type":"Description","Title":"Next.js: Middleware / Proxy bypass in App Router applications vi"}]}}}