CVE-2026-40155— Auth0 Next.js SDK has Improper Proxy Cache Lookup
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I. Basic Information for CVE-2026-40155
Vulnerability Information
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Vulnerability Title
Auth0 Next.js SDK has Improper Proxy Cache Lookup
Source: NVD (National Vulnerability Database)
Vulnerability Description
The Auth0 Next.js SDK is a library for implementing user authentication in Next.js applications. In versions 4.12.0 through 4.17.1, simultaneous requests that trigger a nonce retry may cause the proxy cache fetcher to perform improper lookups for the token request results. Users are affected if their project uses both the vulnerable versions and the proxy handler /me/* and /my-org/* with DPoP enabled. This issue has been fixed in version 4.18.0.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制不正确
Source: NVD (National Vulnerability Database)
Vulnerability Title
nextjs-auth0 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
nextjs-auth0是Auth0开源的一个Next.js SDK，用于使用Auth0登录。 nextjs-auth0 4.12.0至4.17.1版本存在安全漏洞，该漏洞源于同时触发随机数重试的请求可能导致代理缓存获取器对令牌请求结果执行不当查找。
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
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| auth0 | nextjs-auth0 | >= 4.12.0, < 4.18.0 | - |
II. Public POCs for CVE-2026-40155
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|---|
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IV. Related Vulnerabilities
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Auth0 NextJS SDK v4 Missing Session Invalidation - CVE-2021-43812
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Auth0 Next.js SDK has Improper Request Caching Lookup - CVE-2025-65945
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