CVE-2026-107369 — Improper Validation of Post-Login Redirect URL in nextjs-auth0
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-authenti…
Published: 2026-10-13 · CVSS: 6.1 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7