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CVE-2026-44574

Medium

Elevated severity or exploit probability.

CVSS base
8.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
EPSS — probability of exploitation (30 days)
0.7%
49.8th percentile
CISA KEV
Not listed
Weakness / dates
CWE-551
Published 2026-05-13 · modified 2026-08-13

Description

Next.js is a React framework for building full-stack web applications. From 15.4.0 to before 15.5.16 and 16.2.5, applications that rely on middleware to protect dynamic routes can be vulnerable to authorization bypass. In affected deployments, specially crafted query parameters can alter the dynamic route value seen by the page while leaving the visible path unchanged, which can allow protected content to be rendered without passing the expected middleware check. This vulnerability is fixed in 15.5.16 and 16.2.5.

Affected

vercel

References

Official: NVD · CVE.org