{"id":"CVE-2026-45109","summary":"Next.js: Middleware / Proxy bypass in App Router applications via segment-prefetch routes","details":"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.","aliases":["GHSA-26hh-7cqf-hhc6"],"modified":"2026-07-11T04:04:07.931412321Z","published":"2026-05-13T17:11:07.275Z","related":["CGA-vxvh-xxgr-xxcc"],"database_specific":{"cwe_ids":["CWE-288"],"cna_assigner":"GitHub_M","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45109.json"},"references":[{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45109.json"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:34608"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:37272"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-45109"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45109.json"},{"type":"ADVISORY","url":"https://github.com/vercel/next.js/security/advisories/GHSA-26hh-7cqf-hhc6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45109"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2477190"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/vercel/next.js","events":[{"introduced":"b0416fbb44d1d148b6322ed79b6448d588260e49"},{"fixed":"9ff92cebcaa6ba4e7463b6fd037a8510ba9b81ec"},{"introduced":"950609f96f694c5475d18cd2d72a0052ca04d4b9"},{"fixed":"ee6e79b1792a4d401ddf2480f40a83549fe8e722"}],"database_specific":{"source":"CPE_RANGE","extracted_events":[{"introduced":"15.2.0"},{"fixed":"15.5.18"},{"introduced":"16.0.0"},{"fixed":"16.2.6"}],"cpe":"cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:*"}}],"versions":["v15.5.17","v15.5.16","v16.2.5","v15.5.15","v16.2.4","v16.2.3","v16.2.2","v15.5.14","v16.2.1","v15.5.13","v16.2.0","v16.2.0-canary.104","v16.2.0-canary.103","v16.2.0-canary.102","v16.2.0-canary.101","v15.5.12","v16.2.0-canary.100","v16.2.0-canary.99","v16.2.0-canary.98","v16.2.0-canary.97","v16.2.0-canary.96","v16.2.0-canary.95","v16.2.0-canary.94","v16.2.0-canary.93","v16.2.0-canary.92","v16.2.0-canary.91","v16.2.0-canary.90","v16.2.0-canary.89","v16.2.0-canary.88","v16.2.0-canary.87","v16.2.0-canary.86","v16.2.0-canary.85","v16.2.0-canary.84","v16.2.0-canary.83","v16.2.0-canary.82","v16.2.0-canary.81","v16.2.0-canary.78","v16.2.0-canary.80","v16.2.0-canary.79","v16.2.0-canary.77","v16.2.0-canary.76","v16.2.0-canary.75","v16.2.0-canary.74","v16.2.0-canary.71","v16.2.0-canary.73","v16.2.0-canary.69","v16.2.0-canary.72","v16.2.0-canary.70","v16.2.0-canary.68","v16.2.0-canary.67","v16.2.0-canary.66","v16.2.0-canary.65","v16.2.0-canary.64","v16.2.0-canary.63","v16.2.0-canary.62","v16.2.0-canary.61","v16.2.0-canary.60","v16.2.0-canary.59","v16.2.0-canary.58","v16.2.0-canary.57","v16.2.0-canary.56","v16.2.0-canary.55","v16.2.0-canary.54","v16.2.0-canary.53","v16.2.0-canary.52","v16.2.0-canary.51","v16.2.0-canary.50","v16.2.0-canary.49","v16.2.0-canary.48","v16.2.0-canary.47","v16.2.0-canary.46","v16.2.0-canary.45","v16.2.0-canary.44","v16.2.0-canary.43","v16.2.0-canary.42","v16.2.0-canary.41","v16.2.0-canary.40","v16.2.0-canary.39","v16.2.0-canary.38","v16.2.0-canary.37","v16.2.0-canary.36","v16.2.0-canary.35","v16.2.0-canary.34","v16.2.0-canary.33","v16.2.0-canary.32","v16.2.0-canary.31","v16.2.0-canary.30","v16.2.0-canary.29","v16.2.0-canary.28","v16.2.0-canary.27","v16.2.0-canary.26","v16.2.0-canary.25","v16.2.0-canary.24","v16.2.0-canary.23","v16.2.0-canary.22","v16.2.0-canary.21","v16.2.0-canary.20","v16.2.0-canary.19","v16.2.0-canary.18","v16.2.0-canary.17","v16.2.0-canary.16","v16.2.0-canary.15","v15.5.11","v16.2.0-canary.14","v15.5.10","v16.2.0-canary.11","v16.2.0-canary.13","v16.2.0-canary.12","v16.2.0-canary.10","v16.2.0-canary.9","v15.5.9","v16.2.0-canary.8","v16.2.0-canary.7","v16.2.0-canary.6","v16.2.0-canary.5","v16.2.0-canary.4","v16.2.0-canary.3","v16.2.0-canary.2","v16.2.0-canary.1","v16.2.0-canary.0","v16.1.1-canary.36","v16.1.1-canary.35","v16.1.1-canary.34","v16.1.1-canary.33","v16.1.1-canary.32","v16.1.1-canary.30","v16.1.1-canary.31","v16.1.1-canary.29","v16.1.1-canary.28","v16.1.1-canary.27","v16.1.1-canary.26","v16.1.1-canary.25","v16.1.1-canary.24","v16.1.1-canary.23","v16.1.1-canary.22","v16.1.1-canary.21","v16.1.1-canary.20","v16.1.1-canary.19","v16.1.1-canary.18","v16.1.1-canary.17","v16.1.1-canary.16","v16.1.1-canary.15","v16.1.1-canary.14","v16.1.1-canary.13","v16.1.1-canary.12","v16.1.1-canary.11","v16.1.1-canary.10","v16.1.1-canary.9","v16.1.1-canary.8","v16.1.1-canary.7","v16.1.1-canary.6","v16.1.1-canary.5","v16.1.1-canary.4","v16.1.0","v16.1.1-canary.3","v16.1.1-canary.2","v16.1.1-canary.1","v16.1.1-canary.0","v16.1.0-canary.34","v16.1.0-canary.33","v16.1.0-canary.32","v16.1.0-canary.31","v16.1.0-canary.30","v16.1.0-canary.29","v16.1.0-canary.28","v16.1.0-canary.27","v16.1.0-canary.26","v16.1.0-canary.25","v16.1.0-canary.24","v16.1.0-canary.23","v16.1.0-canary.22","v16.1.0-canary.21","v16.1.0-canary.20","v16.1.0-canary.19","v15.5.8","v16.1.0-canary.18","v16.1.0-canary.17","v15.5.7","v16.1.0-canary.16","v16.1.0-canary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