{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:*",
            "extracted_events": [
              {
                "introduced": "15.2.0"
              },
              {
                "fixed": "15.5.18"
              },
              {
                "introduced": "16.0.0"
              },
              {
                "fixed": "16.2.6"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "b0416fbb44d1d148b6322ed79b6448d588260e49"
            },
            {
              "fixed": "9ff92cebcaa6ba4e7463b6fd037a8510ba9b81ec"
            },
            {
              "introduced": "950609f96f694c5475d18cd2d72a0052ca04d4b9"
            },
            {
              "fixed": "ee6e79b1792a4d401ddf2480f40a83549fe8e722"
            }
          ],
          "repo": "https://github.com/vercel/next.js",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-26hh-7cqf-hhc6"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-288"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45109.json"
  },
  "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.",
  "id": "CVE-2026-45109",
  "modified": "2026-07-11T03:54:34.641868230Z",
  "published": "2026-05-13T17:11:07.275Z",
  "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"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Next.js: Middleware / Proxy bypass in App Router applications via segment-prefetch routes"
}