CVE-2026-44574 Details
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.
A vulnerability allowing authorization bypass has been identified in Next.js versions 15.4.0 prior to 15.5.16 and 16.0.0 prior to 16.2.5. This issue arises in applications that use middleware to protect dynamic routes. In affected deployments, specially crafted query parameters can manipulate the dynamic route value perceived by the page, while keeping the visible path unchanged. This manipulation can enable protected content to be displayed without undergoing the necessary middleware verification.
Users can upgrade to Next.js versions 15.5.16 or 16.2.5 to address this vulnerability. If an immediate upgrade is not possible, it is recommended to enforce authorization within route or page logic, rather than relying solely on middleware path matching.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 14, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://access.redhat.com/errata/RHSA-2026:34608 | redhat-SADP | |
| https://access.redhat.com/errata/RHSA-2026:37272 | redhat-SADP | |
| https://access.redhat.com/errata/RHSA-2026:40974 | redhat-SADP | |
| https://access.redhat.com/errata/RHSA-2026:54435 | redhat-SADP | |
| https://access.redhat.com/security/cve/CVE-2026-44574 | redhat-SADP | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2477207 | redhat-SADP | |
| https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44574.json | redhat-SADP | |
| https://github.com/vercel/next.js/security/advisories/GHSA-492v-c6pp-mqqv | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-288 | Authentication Bypass Using an Alternate Path or Channel | [email protected] |
| CWE-551 | Incorrect Behavior Order: Authorization Before Parsing and Canonicalization | redhat-SADP |
Affected Products
| Product | Versions |
|---|---|
| vercel next.js | >= 15.4.0, < 15.5.16 >= 16.0.0, < 16.2.5 |
CPE
Remediation
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Change History
10 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 13, 2026 | CVE Modified | redhat-SADP |
| Jul 16, 2026 | CVE Modified | redhat-SADP |
| Jul 15, 2026 | CVE Modified | redhat-SADP |
| Jul 10, 2026 | CVE Modified | redhat-SADP |
| Jul 3, 2026 | CVE Modified | redhat-SADP |
| Jun 30, 2026 | CVE Modified | redhat-SADP |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 14, 2026 | Initial Analysis | [email protected] |
| May 13, 2026 | New CVE Received | [email protected] |