{"id":"CVE-2026-107369","title":"The auth0/nextjs-auth0 SDK validates that the returnTo parameter is a same-origin URL","summary":"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 …","severity":"medium","cvss":6.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","cwe":["CWE-601"],"published":"2026-10-13","updated":"2026-10-13","sourceUpdated":"2026-10-13T21:17:32.093","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-107369","references":[{"url":"https://github.com/auth0/nextjs-auth0/security/advisories/GHSA-5vvp-h2v6-59j6","label":"psirt@okta.com"},{"url":"https://trust.okta.com/security-advisories/improper-validation-of-post-login-redirect-url-in-nextjs-auth0-cve-2026-107369","label":"psirt@okta.com"}],"tags":["nvd"],"ingestedAt":"2026-10-13T21:58:14.177Z","slug":"CVE-2026-107369","body":"## Overview\n\nThe 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":34,"depthScoreParts":{"impact":33.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}