GHSA-xq8m-7c5p-c2r6
Auth0 Next.js SDK has Improper Proxy Cache Lookup
Quick fix
GHSA-xq8m-7c5p-c2r6 — @auth0/nextjs-auth0: upgrade to the fixed version with the command below.
npm install @auth0/nextjs-auth0@4.18.0Details
### Description In affected versions of the Next.js SDK, simultaneous requests that trigger a nonce retry may cause the proxy cache fetcher to perform improper lookups for the token request results.
### Which Projects are Affected? Users are affected if they meet all of the following preconditions: - Applications using the auth0/nextjs-auth0 SDK, versions 4.12.0 to 4.17.0, and - Applications using the proxy handler /me/* and /my-org/* with DPoP enabled.
### Affected product and versions Auth0/nextjs-auth0 v4.12.0 to 4.17.0
### Resolution Upgrade Auth0/nextjs-auth0 version to v4.18.0 or greater
### Acknowledgements Okta would like to thank Reynaldo Immanuel for their discovery and responsible disclosure.
Are you affected?
Enter the version of the package you're using.
Affected packages
4.12.0Fixed in: 4.18.0npm install @auth0/nextjs-auth0@4.18.0References
- https://github.com/auth0/nextjs-auth0/security/advisories/GHSA-xq8m-7c5p-c2r6[WEB]
- https://nvd.nist.gov/vuln/detail/CVE-2026-40155[ADVISORY]
- https://github.com/auth0/nextjs-auth0/commit/98c36dc306970c2230ea1a32efef431d29b99978[WEB]
- https://github.com/auth0/nextjs-auth0[PACKAGE]
- https://github.com/auth0/nextjs-auth0/releases/tag/v4.18.0[WEB]