Medium severity · published Oct 13, 2026
CVE-2026-107369
Improper Validation of Post-Login Redirect URL in nextjs-auth0
6.1
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 13% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NE
nextjs-auth0 · Auth0
before 4.32.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-107369
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-107369
trust.okta.com
https://trust.okta.com/security-advisories/improper-validation-of-post-login-redirect-url-in-nextjs-auth0-cve-2026-107369
github.com
https://github.com/auth0/nextjs-auth0/security/advisories/GHSA-5vvp-h2v6-59j6
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