GHSA-223J-4RM8-MRMF Next.js may leak x-middleware-subrequest-id to external hosts

Summary In the process of remediating CVE-2025-29927, we looked at other possible exploits of Middleware. We independently verified this low severity vulnerability in parallel with two reports from independent researchers. Learn more here. Credit Thank you to Jinseo Kim kjsman and RyotaK GMO Flat...

CVE-2025-30218

Next.js is a React framework for building full-stack web applications. To mitigate CVE-2025-29927, Next.js validated the x-middleware-subrequest-id which persisted across multiple incoming requests. However, this subrequest ID is sent to all requests, even if the destination is not the same host ...

CVE-2025-30218

Next.js (React framework) contains a vulnerability where x-middleware-subrequest-id is exposed to third-party destinations when a fetch to a different host occurs inside Middleware. Root cause: subrequest-id validation persisted across requests whereas destinations can differ, allowing informatio...

CVE-2025-30218 Next.js may leak x-middleware-subrequest-id to external hosts

Next.js is a React framework for building full-stack web applications. To mitigate CVE-2025-29927, Next.js validated the x-middleware-subrequest-id which persisted across multiple incoming requests. However, this subrequest ID is sent to all requests, even if the destination is not the same host ...

CVE-2025-30218

Next.js is a React framework for building full-stack web applications. To mitigate CVE-2025-29927, Next.js validated the x-middleware-subrequest-id which persisted across multiple incoming requests. However, this subrequest ID is sent to all requests, even if the destination is not the same host ...

CVE-2025-30218 Next.js may leak x-middleware-subrequest-id to external hosts

Next.js is a React framework for building full-stack web applications. To mitigate CVE-2025-29927, Next.js validated the x-middleware-subrequest-id which persisted across multiple incoming requests. However, this subrequest ID is sent to all requests, even if the destination is not the same host ...

CVE-2025-30218: Exposure of Sensitive Information to an Unauthorized Actor

Next.js is a React framework for building full-stack web applications. To mitigate CVE-2025-29927, Next.js validated the x-middleware-subrequest-id which persisted across multiple incoming requests. However, this subrequest ID is sent to all requests, even if the destination is not the same host ...

Vulnerability fixed in Next.js

Vercel has fixed a vulnerability in Next.js Specific to versions 14.2.25 and 15.2.3 Next.js is a popular framework for developing Web applications. The vulnerability is in the way Next.js handles authentication checks in its own middleware. This allows malicious actors to bypass these controls,...

PT-2025-14552

Name of the Vulnerable Software and Affected Versions Next.js versions prior to 12.3.6 Next.js versions prior to 13.5.10 Next.js versions prior to 14.2.26 Next.js versions prior to 15.2.4 Description The issue concerns the leakage of the x-middleware-subrequest-id across multiple incoming request...

Exploit for CVE-2025-29927

CVE-2025-29927: Next.js Middleware Bypass PoC Overview This...

Exploit for CVE-2025-29927

CVE-2025-29927 Next.js Middleware Authorization Bypass T...

GHSA-F82V-JWR5-MFFW Authorization Bypass in Next.js Middleware

Impact It is possible to bypass authorization checks within a Next.js application, if the authorization check occurs in middleware. Patches For Next.js 15.x, this issue is fixed in 15.2.3 For Next.js 14.x, this issue is fixed in 14.2.25 For Next.js 13.x, this issue is fixed in 13.5.9 For Next.js...

CVE-2025-29927

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 ...

CVE-2025-29927: Improper Authorization

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 ...

Next.js Middleware Authorization Bypass Scanner

This module detects self-hosted Next.js applications affected by CVE-2025-29927, an authorization bypass in the middleware layer. Next.js tags its own internal subrequests with the x-middleware-subrequest header and skips middleware when it sees it. The header is trusted without verifying it...

Linux Distros Unpatched Vulnerability : CVE-2024-46748

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In the Linux kernel, the following vulnerability has been resolved: cachefiles: Set the max subreq size for cache writes to MAXRWCOUNT Set the maximum size of a...

UBUNTU-CVE-2024-57928

In the Linux kernel, the following vulnerability has been resolved: netfs: Fix enomem handling in buffered reads If netfsreadtopagecache gets an error from either -prepareread or from netfspreparereaditerator, it needs to decrement -nroutstanding, cancel the subrequest and break out of the issuin...

PT-2026-8125

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description The Linux kernel contains a flaw in the netfs component related to the handling of read requests and folio unlocking. Specifically, the issue arises when collecting read results for...

SUSE CVE-2024-46748

In the Linux kernel, the following vulnerability has been resolved: cachefiles: Set the max subreq size for cache writes to MAXRWCOUNT Set the maximum size of a subrequest that writes to cachefiles to be MAXRWCOUNT so that we don't overrun the maximum write we can make to the backing filesystem...

DEBIAN-CVE-2024-46748

In the Linux kernel, the following vulnerability has been resolved: cachefiles: Set the max subreq size for cache writes to MAXRWCOUNT Set the maximum size of a subrequest that writes to cachefiles to be MAXRWCOUNT so that we don't overrun the maximum write we can make to the backing filesystem...