CVE-2025-30218— Next.js may leak x-middleware-subrequest-id to external hosts
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2025-30218
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Next.js may leak x-middleware-subrequest-id to external hosts
Source: NVD (National Vulnerability Database)
Vulnerability Description
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 as the Next.js application. Initiating a fetch request to a third-party within Middleware will send the x-middleware-subrequest-id to that third party. This vulnerability is fixed in 12.3.6, 13.5.10, 14.2.26, and 15.2.4.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
信息暴露
Source: NVD (National Vulnerability Database)
Vulnerability Title
Next.js 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Next.js是Vercel开源的一个 React 框架。 Next.js存在信息泄露漏洞，该漏洞源于x-middleware-subrequest-id验证不足，可能导致信息泄露。以下版本受到影响：12.3.6之前版本、13.5.10之前版本、14.2.26之前版本和15.2.4之前版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-30218
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2025-30218
请登录查看更多情报信息。
IV. Related Vulnerabilities
Same product: next.js
- CVE-2026-29057
Next.js: HTTP request smuggling in rewrites - CVE-2026-27980
Next.js: Unbounded next/image disk cache growth can exhaust - CVE-2026-27979
Next.js: Unbounded postponed resume buffering can lead to Do - CVE-2026-27978
Next.js: null origin can bypass Server Actions CSRF checks - CVE-2026-27977
Next.js: null origin can bypass dev HMR websocket CSRF check
Same vendor: vercel
- CVE-2026-29057
Next.js: HTTP request smuggling in rewrites - CVE-2026-27980
Next.js: Unbounded next/image disk cache growth can exhaust - CVE-2026-27979
Next.js: Unbounded postponed resume buffering can lead to Do - CVE-2026-27978
Next.js: null origin can bypass Server Actions CSRF checks - CVE-2026-27977
Next.js: null origin can bypass dev HMR websocket CSRF check
Same weakness: CWE-200
- CVE-2026-42333
quarkus-openapi-generator has overly broad path-parameter ma - CVE-2026-8198
Activity Logs, User Activity Tracking, Multisite Activity Lo - CVE-2026-42456
AnythingLLM: Cross-User TTS Audio Disclosure via Chat ID (ID - CVE-2026-41520
Cillium exposes sensitive information included in the cilium - CVE-2026-25199
Apache CloudStack: Proxmox Extension Allows Unauthorized Cro
V. Comments for CVE-2025-30218
No comments yet