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CVE-2026-44574

Next.js: Middleware / Proxy bypass through dynamic route parameter injection

Published: May 13, 2026Updated: Jun 30, 2026 Sources: CVE List NVD BDUCWE-288
8.1HIGH
NVD MITRE
EPSS Score
0.4%
Top 64.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-288CWE-551

Affected Products

Vercel
commercial·US
Next.jsLibraryLibrary
OSS Libraries / web-framework
and 1 more affected products View all →

Exploitability

Official Patch Available
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References

https://github.com/vercel/next.js/security/advisories/GHSA-492v-c6pp-mqqv
github.com
https://access.redhat.com/security/cve/CVE-2026-44574
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2477207
bugzilla.redhat.com
and 3 more references View all →
News mentions
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