CVE-2026-107369

EUVD-2026-100481
The auth0/nextjs-auth0 SDK validates that the returnTo parameter is a same-origin URL. The SDK then stores this value and, in a later step, reconstructs it for the post-authentication redirect. The reconstruction logic can produce a URL that browsers interpret as an absolute or scheme-relative path, leading to a redirect to an unintended domain.
Open Redirect
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
OktaCNA
6.1 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 12.21%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
auth0nextjs-auth0
𝑥
< 4.32.0
CNA
Common Weakness Enumeration
References
https://github.com/auth0/nextjs-auth0/security/advisories/GHSA-5vvp-h2v6-59j6
https://trust.okta.com/security-advisories/improper-validation-of-post-login-redirect-url-in-nextjs-auth0-cve-2026-107369