{"cve":"CVE-2026-45109","nvd":{"published":"2026-05-13T18:16:19.283","modified":"2026-10-26T14:10:00.130","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-288","CWE-358"],"references":["https://github.com/vercel/next.js/security/advisories/GHSA-26hh-7cqf-hhc6","https://access.redhat.com/errata/RHSA-2026:34608","https://access.redhat.com/errata/RHSA-2026:37272","https://access.redhat.com/errata/RHSA-2026:40974","https://access.redhat.com/errata/RHSA-2026:54435"],"products":["vercel:next.js"],"source":"nvd","synced_at":"2026-10-26T14:27:29.784594657+00:00"},"epss":{"cve":"CVE-2026-45109","score":0.00602,"percentile":0.48492,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-26hh-7cqf-hhc6","url":"https://osv.dev/vulnerability/GHSA-26hh-7cqf-hhc6","summary":"Next.js has a Middleware / Proxy bypass in App Router applications via segment-prefetch routes - Incomplete Fix Follow-Up","modified":"2026-09-10T03:50:45.324330779Z","packages":[{"ecosystem":"npm","name":"next","purl":"pkg:npm/next","ranges":[">=15.2.0 <15.5.18"],"fixed":["15.5.18"]},{"ecosystem":"npm","name":"next","purl":"pkg:npm/next","ranges":[">=16.0.0 <16.2.6"],"fixed":["16.2.6"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}