5.4

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2025-67490

CVE-2025-67490: Auth0 Next.js SDK has Improper Request Caching Lookup

The Auth0 Next.js SDK is a library for implementing user authentication in Next.js applications. When using versions 4.11.0 through 4.11.2 and 4.12.0, simultaneous requests on the same client may result in improper lookups in the TokenRequestCache for the request results. This issue is fixed in versions 4.11.2 and 4.12.1.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2025-67490

CVE-2025-67490:

5.4

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
@auth0/nextjs-auth0	npm	>= 4.11.0, < 4.11.2	4.11.2
@auth0/nextjs-auth0	npm	>= 4.12.0, < 4.12.1	4.12.1

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability lies in a flawed caching mechanism within the Auth0Client for handling access token requests. When multiple requests for tokens occur concurrently in a singleton client instance, a race condition can happen in the TokenRequestCache. The TokenRequestCache.getTokenCacheKey method generated a cache key based on the token's audience and scope, which was not unique enough to differentiate between simultaneous, distinct requests. This led to cache collisions where one request would incorrectly receive the cached result of another, potentially assigning an access token to the wrong user or session. The main entry point to this vulnerable logic was the Auth0Client.getAccessToken method. The fix addresses the root cause by completely removing the TokenRequestCache class and its associated methods (execute, getTokenCacheKey), thereby ensuring that every call to getAccessToken results in a new, uncached request to the authorization server.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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