Vulnerability · Published Oct 13, 2026 · Assigned by Okta
CVE-2026-107369Improper Validation of Post-Login Redirect URL in nextjs-auth0
Medium 6.1
In plain English
A medium-severity open redirect in nextjs-auth0 from Auth0. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities).
Severity (CVSS 3.1)6.1Medium
Exploit odds (30 days)0.2%top 86.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Auth0 | nextjs-auth0 | 0 – before 4.32.0 |
Weakness: CWE-601 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N