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CVE-2025-29927

Published: Mar 21, 2025Modified: Jun 17, 2026

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9.1
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Exploitability: 3.9 / Impact: 5.2
Source: security-advisories@github.com (Secondary)

Description

Next.js is a React framework for building full-stack web applications. Starting in version 1.11.4 and prior to versions 12.3.5, 13.5.9, 14.2.25, and 15.2.3, it is possible to bypass authorization checks within a Next.js application, if the authorization check occurs in middleware. If patching to a safe version is infeasible, it is recommend that you prevent external user requests which contain the x-middleware-subrequest header from reaching your Next.js application. This vulnerability is fixed in 12.3.5, 13.5.9, 14.2.25, and 15.2.3.

Affected (4)

Products: Vercel: Next.js
1 product
Next.js
Configuration A
4 vulnerable
Vulnerable SoftwareAffected Versions
Vercel
From 11.1.4 to 12.3.5
From 13.0.0 to 13.5.9
From 14.0.0 to 14.2.25
From 15.0.0 to 15.2.3

References (8)

Source: security-advisories@github.com
Release Notes
Source: security-advisories@github.com
Release Notes
Source: security-advisories@github.com
Vendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory

Timeline

No history available yet.