{"schema_version":1,"title":"Auth.js NextAuth.js vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 7 vulnerabilities in Auth.js NextAuth.js: 0 in the last 7 days and 7 in the last 90 days, 2 of them critical and 0 exploited in the wild. The most recent, CVE-2026-73420, was published on 13 August 2026.","url":"https://junglewise.ai/threats/technologies/nextauth-js","json_url":"https://junglewise.ai/threats/technologies/nextauth-js.json","publisher":"Junglewise Threat Intelligence","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","attribution":"Junglewise Threat Intelligence, https://junglewise.ai/threats/technologies/nextauth-js","sources":"NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories","kind":"technology","counts":{"high":2,"all_time":7,"critical":2,"exploited":0,"last_7_days":0,"last_30_days":0,"last_90_days":7,"last_365_days":7},"latest":[{"cve":"CVE-2026-73420","cvss":4,"epss":0.0073,"slug":"cve-2026-73420-auth-js-email-normalizer-homoglyph-bypass-in-passwordless-sign-in","title":"NextAuth.js provides authentication for Next.js. Prior to @auth/core 0.41.3 and next-auth 4.24.15 and 5.0.0-beta.32, the defaultNormalizer u","severity":"medium","exploited":false,"published_at":"2026-08-13T22:17:26.297+00:00","url":"https://junglewise.ai/threats/cve-2026-73420-auth-js-email-normalizer-homoglyph-bypass-in-passwordless-sign-in"},{"cve":"CVE-2026-73419","cvss":6.8,"epss":0.0025,"slug":"cve-2026-73419-auth-js-oauth-provider-confusion-in-state-nonce-pkce-cookies","title":"NextAuth.js provides authentication for Next.js. Prior to@auth/core 0.41.3 and next-auth 4.24.15 and 5.0.0-beta.32, Auth.js stores the OAuth","severity":"medium","exploited":false,"published_at":"2026-08-12T21:17:41.033+00:00","url":"https://junglewise.ai/threats/cve-2026-73419-auth-js-oauth-provider-confusion-in-state-nonce-pkce-cookies"},{"cve":"CVE-2026-73418","cvss":7.5,"epss":0.0088,"slug":"cve-2026-73418-auth-js-gettoken-exception-on-malformed-bearer-headers","title":"NextAuth.js provides authentication for Next.js. Prior to @auth/core 0.41.3 and next-auth 4.24.15 and 5.0.0-beta.32, the exported getToken()","severity":"high","exploited":false,"published_at":"2026-08-12T21:17:40.89+00:00","url":"https://junglewise.ai/threats/cve-2026-73418-auth-js-gettoken-exception-on-malformed-bearer-headers"},{"cvss":9.1,"slug":"auth-js-improper-authorization-via-fail-open-on-configuration-errors-8d3c59da","title":"Auth.js improper authorization via fail-open on configuration errors","severity":"critical","exploited":false,"published_at":"2026-07-23T14:52:23+00:00","url":"https://junglewise.ai/threats/auth-js-improper-authorization-via-fail-open-on-configuration-errors-8d3c59da"},{"cvss":7.5,"slug":"auth-js-denial-of-service-via-malformed-bearer-headers-in-gettoken-05b71eee","title":"Auth.js denial of service via malformed Bearer headers in getToken","severity":"high","exploited":false,"published_at":"2026-07-23T14:42:55+00:00","url":"https://junglewise.ai/threats/auth-js-denial-of-service-via-malformed-bearer-headers-in-gettoken-05b71eee"},{"cvss":9.1,"slug":"auth-js-incorrect-behavior-order-in-email-normalizer-allows-account-afc9f715","title":"Auth.js incorrect behavior order in email normalizer allows account takeover","severity":"critical","exploited":false,"published_at":"2026-07-23T14:40:15+00:00","url":"https://junglewise.ai/threats/auth-js-incorrect-behavior-order-in-email-normalizer-allows-account-afc9f715"},{"cvss":6.8,"slug":"auth-js-insufficient-verification-of-oauth-provider-in-account-linking-0b9ed8b7","title":"Auth.js insufficient verification of OAuth provider in account linking","severity":"medium","exploited":false,"published_at":"2026-07-23T14:31:51+00:00","url":"https://junglewise.ai/threats/auth-js-insufficient-verification-of-oauth-provider-in-account-linking-0b9ed8b7"}],"weekly":[{"week":"2026-06-29","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-06","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-13","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-20","critical":2,"exploited":0,"vulnerabilities":4},{"week":"2026-07-27","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-03","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-10","critical":0,"exploited":0,"vulnerabilities":3},{"week":"2026-08-17","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-24","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-31","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-07","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-14","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-21","critical":0,"exploited":0,"vulnerabilities":0}],"related":[],"technology":{"hub":true,"name":"Auth.js NextAuth.js","slug":"nextauth-js","vendor":{"name":"Auth.js","slug":"auth-js","url":"https://junglewise.ai/threats/vendors/auth-js"},"aliases":[],"category":"library","homepage":"https://next-auth.js.org/","repo_url":"https://github.com/nextauthjs/next-auth","description":"A complete open-source authentication solution for Next.js applications.","url":"https://junglewise.ai/threats/technologies/nextauth-js"},"most_severe":[{"cvss":9.1,"slug":"auth-js-improper-authorization-via-fail-open-on-configuration-errors-8d3c59da","title":"Auth.js improper authorization via fail-open on configuration errors","severity":"critical","exploited":false,"published_at":"2026-07-23T14:52:23+00:00","url":"https://junglewise.ai/threats/auth-js-improper-authorization-via-fail-open-on-configuration-errors-8d3c59da"},{"cvss":9.1,"slug":"auth-js-incorrect-behavior-order-in-email-normalizer-allows-account-afc9f715","title":"Auth.js incorrect behavior order in email normalizer allows account takeover","severity":"critical","exploited":false,"published_at":"2026-07-23T14:40:15+00:00","url":"https://junglewise.ai/threats/auth-js-incorrect-behavior-order-in-email-normalizer-allows-account-afc9f715"},{"cve":"CVE-2026-73418","cvss":7.5,"epss":0.0088,"slug":"cve-2026-73418-auth-js-gettoken-exception-on-malformed-bearer-headers","title":"NextAuth.js provides authentication for Next.js. Prior to @auth/core 0.41.3 and next-auth 4.24.15 and 5.0.0-beta.32, the exported getToken()","severity":"high","exploited":false,"published_at":"2026-08-12T21:17:40.89+00:00","url":"https://junglewise.ai/threats/cve-2026-73418-auth-js-gettoken-exception-on-malformed-bearer-headers"},{"cvss":7.5,"slug":"auth-js-denial-of-service-via-malformed-bearer-headers-in-gettoken-05b71eee","title":"Auth.js denial of service via malformed Bearer headers in getToken","severity":"high","exploited":false,"published_at":"2026-07-23T14:42:55+00:00","url":"https://junglewise.ai/threats/auth-js-denial-of-service-via-malformed-bearer-headers-in-gettoken-05b71eee"},{"cve":"CVE-2026-73419","cvss":6.8,"epss":0.0025,"slug":"cve-2026-73419-auth-js-oauth-provider-confusion-in-state-nonce-pkce-cookies","title":"NextAuth.js provides authentication for Next.js. Prior to@auth/core 0.41.3 and next-auth 4.24.15 and 5.0.0-beta.32, Auth.js stores the OAuth","severity":"medium","exploited":false,"published_at":"2026-08-12T21:17:41.033+00:00","url":"https://junglewise.ai/threats/cve-2026-73419-auth-js-oauth-provider-confusion-in-state-nonce-pkce-cookies"},{"cvss":6.8,"slug":"auth-js-insufficient-verification-of-oauth-provider-in-account-linking-0b9ed8b7","title":"Auth.js insufficient verification of OAuth provider in account linking","severity":"medium","exploited":false,"published_at":"2026-07-23T14:31:51+00:00","url":"https://junglewise.ai/threats/auth-js-insufficient-verification-of-oauth-provider-in-account-linking-0b9ed8b7"},{"cve":"CVE-2026-73420","cvss":4,"epss":0.0073,"slug":"cve-2026-73420-auth-js-email-normalizer-homoglyph-bypass-in-passwordless-sign-in","title":"NextAuth.js provides authentication for Next.js. Prior to @auth/core 0.41.3 and next-auth 4.24.15 and 5.0.0-beta.32, the defaultNormalizer u","severity":"medium","exploited":false,"published_at":"2026-08-13T22:17:26.297+00:00","url":"https://junglewise.ai/threats/cve-2026-73420-auth-js-email-normalizer-homoglyph-bypass-in-passwordless-sign-in"}],"generated_at":"2026-09-26T09:11:00.170868+00:00"}