CVE WatchJul 16, 2026

CVE-2026-45109

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 a

CVSS

7.5

High

EPSS

0.5%

p42

KEV

—

Exploit Today

0-100

Published: May 13, 2026 · Last modified: Jul 16, 2026 · CWE-288 · CWE-358

EPSS · 30d

0.5%EPSS · 30 days0.5%

2026-06-302026-07-16

Technical 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.

Official references

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——22Next.js is a React framework for building full-stack web applications. From 15.2.0 to before 15.5.16 and 16.2.5, App Router applications that rely on middleware or proxy-based checks for authorization can allow unauthorized access through transport-specific route variants used for segment prefetching. In affected configurations, specially crafted .rsc and segment-prefetch URLs can resolve to the same page without being matched by the intended middleware rule, which can allow protected content to be reached without the expected authorization check. This vulnerability is fixed in 15.5.16 and 16.2.5.20h CVE-2023-370579.8 CRI

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