CVE-2026-45109
highNext.js is a React framework for building full-stack web applications.
Vendor / product: Vercel — next.js
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
7.5
7.5 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Severity source: NVD CVSS v3.1 (security-advisories@github.com)
Timeline (UTC)
Published: 2026-05-13 18:16
Modified: 2026-11-04 04:17
NVD status: Modified
Last synced 23 hours ago
Verified against the source API 2026-11-04 04:28 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
vercel / next.js ≥15.2.0 <15.5.18, ≥16.0.0 <16.2.6
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
References
- https://github.com/vercel/next.js/releases/tag/v15.5.18 security-advisories@github.com
- https://github.com/vercel/next.js/releases/tag/v16.2.6 security-advisories@github.com
- https://github.com/vercel/next.js/security/advisories/GHSA-267c-6grr-h53f security-advisories@github.com
- https://github.com/vercel/next.js/security/advisories/GHSA-26hh-7cqf-hhc6 security-advisories@github.com
- https://vercel.com/changelog/next-js-may-2026-security-release security-advisories@github.com
- https://access.redhat.com/errata/RHSA-2026:34608 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- https://access.redhat.com/errata/RHSA-2026:37272 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- https://access.redhat.com/errata/RHSA-2026:40974 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- https://access.redhat.com/errata/RHSA-2026:54435 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- https://access.redhat.com/security/cve/CVE-2026-45109 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- https://bugzilla.redhat.com/show_bug.cgi?id=2477190 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45109.json 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Data sources
NVD CVE API 2.0 — fetched 2026-11-04 04:28 UTC · record ↗