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TI-2026-73625 Aliases CVE-2026-107369

Open redirect in Auth0 nextjs-auth0 after login

Priority LOW 27CWE-601Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-601.

Summary

The auth0/nextjs-auth0 SDK from Auth0 before 4.32.0 validates that the returnTo parameter is a same-origin URL, but it later rebuilds that value for the post-authentication redirect. The rebuilt URL can be read by browsers as an absolute or scheme-relative path, which redirects users to an unintended domain (CWE-601). An unauthenticated remote attacker can get a user to follow a crafted login link, and user interaction is required.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00225 13th percentileScored 2026-11-07
Fix Fixed nextjs-auth0 (Auth0): 4.32.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
auth0nextjs-auth0before 4.32.04.32.0Patch availableCNA
  • nextjs-auth0 Vendorauth0 Affected before 4.32.0 Fixed in 4.32.0 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:auth0:nextjs-auth0:*:*:*:*:*:*:*:*——auth0
  • cpe:2.3:a:auth0:nextjs-auth0:*:*:*:*:*:*:*:* Versions — — ·auth0

Remediation

Upgrade nextjs-auth0 to version 4.32.0 or later, which fixes the issue.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA nextjs-auth0 (Auth0) Fixed in 4.32.0

Timeline

  1. 2026-10-13 Threatist record created from CVE-2026-107369
  2. 2026-10-14 Priority changed: MEDIUM → LOW
  3. 2026-10-15 CISA SSVC decision points changed

References

Other 2

  • TI-2015-07615 Improper input validation in HackerOne jsonwebtoken node module CVSS 3.0CRITICAL 9.8
  • TI-2025-29805 Brute Force Authentication Tags of CookieStore Sessions in Auth0-PHP SDK CVSS 3.1CRITICAL 9.1
  • TI-2025-31089 Auth0-PHP SDK Deserialization of Untrusted Data vulnerability CVSS 4.0CRITICAL 9.3
  • TI-2020-06427 An issue was discovered in the Login by Auth0 plugin before 4.0.0 for WordPress. CVSS 3.1CRITICAL 9.8
  • TI-2018-05020 The Auth0 authentication service before 2017-10-15 allows privilege escalation because… CVSS 3.0CRITICAL 9.8
  • TI-2019-05387 Auth0 Auth0-WCF-Service-JWT before 1.0.4 leaks the expected JWT signature in an error… CVSS 3.0CRITICAL 9.8
See all 57 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences