CVE-2026-107369
Medium
Description
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.
SeverityMedium
CVSS6.1
Exploit probability—
Product
Nextjs-auth0
PublishedOct 13, 2026
First seenOct 13, 2026
Weakness typeCWE-601Open redirect
How to fix
Update
- Auth0 nextjs-auth04.32.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Auth0 nextjs-auth0 | v < 4.32.0 | 4.32.0 |
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