Medium 5.4Published Apr 17, 2026

CVE-2026-40155The Auth0 Next.js SDK is a library for implementing user authentication in Next.js applications.

Updated under an hour ago (2026-10-19 07:00 UTC)

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It affects auth0 nextjs-auth0. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for auth0 nextjs-auth0

Exploited in the last 30 days

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.

CVSS: 5.4 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:N
Weakness (CWE): CWE-362, CWE-863
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jun 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

auth0 nextjs-auth0 auth0:nextjs-auth0	from 4.12.0 before 4.18.0	NVD

References

https://github.com/auth0/nextjs-auth0/commit/98c36dc306970c2230ea1a32efef431d29b99978patch
https://github.com/auth0/nextjs-auth0/releases/tag/v4.18.0product, release-notes
https://github.com/auth0/nextjs-auth0/security/advisories/GHSA-xq8m-7c5p-c2r6vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.