CVE-2026-45109

Name: CVE-2026-45109
Creator: NVD / NIST
Published: 2026-05-13T18:16:19.283+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.39%

Last modified Jun 17, 2026

CVE-2026-45109 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.39% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.39%

30.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-288

Affected Software

Vendor	Product	Versions
Vercel	Next.Js	>= 15.2.0, < 15.5.18
Vercel	Next.Js	>= 16.0.0, < 16.2.6

References

https://github.com/vercel/next.js/security/advisories/GHSA-26hh-7cqf-hhc6Vendor Advisory

Timeline

Published: May 13, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-45109?

How severe is CVE-2026-45109?

CVE-2026-45109 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.39% probability of exploitation in the next 30 days.

How do I fix CVE-2026-45109?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-45109?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST