EUVD-2026-23537

Auth0 Next.js SDK has Improper Proxy Cache Lookup...

Incorrect Authorization

Overview @auth0/nextjs-auth0 is a Next.js SDK for signing in with Auth0 Affected versions of this package are vulnerable to Incorrect Authorization in the proxy cache fetcher. An attacker can gain unauthorized access to sensitive information or perform actions with insufficient authorization by...

CVE-2026-40155

The CVE concerns the Auth0 Next.js SDK. Affected versions: 4.12.0–4.17.1. Issue: when multiple simultaneous requests trigger a nonce retry, the proxy cache fetcher may perform improper lookups for token request results. Impact: affects projects using both the vulnerable SDK versions and the proxy...