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CWE

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CVE-2026-40155

Published: Apr 17, 2026

Modified: Apr 20, 2026

PUBLISHED

CVSS v3.1

5.4

MEDIUM

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.

Vendor	Product	Versions
auth0	nextjs-auth0	affected `>= 4.12.0, < 4.18.0`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

Low

Availability

None

References

https://github.com/auth0/nextjs-auth0/security/advisories/GHSA-xq8m-7c5p-c2r6

x_refsource_CONFIRM

https://github.com/auth0/nextjs-auth0/commit/98c36dc306970c2230ea1a32efef431d29b99978

x_refsource_MISC

https://github.com/auth0/nextjs-auth0/releases/tag/v4.18.0

x_refsource_MISC

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