{"action":"Upgrade @auth/core to 0.41.3 or later.","affected":[{"fixed":"0.41.3","introduced":"0.1.0"}],"component":"@auth/core","cve_ids":["CVE-2026-73420"],"ecosystem":"npm","epss":0.00725,"exploited":false,"fixed_versions":["0.41.3"],"ghsa_id":"GHSA-7rqj-j65f-68wh","id":"tcs_01M5KFAWD164C92SRHJHNGM7EB","modified_at":"2026-09-10T03:50:51.566945120Z","published_at":"2026-07-23T14:40:15Z","references":["https://osv.dev/vulnerability/GHSA-7rqj-j65f-68wh","https://github.com/nextauthjs/next-auth/security/advisories/GHSA-7rqj-j65f-68wh","https://github.com/nextauthjs/next-auth/commit/19d2feb24359fa8c79418907fc68d9ec8152ca94","https://github.com/nextauthjs/next-auth/commit/a63eee12a1a20cb35209e44195b097868517b9a0","https://github.com/nextauthjs/next-auth","https://github.com/nextauthjs/next-auth/releases/tag/@auth/core@0.41.3","https://github.com/nextauthjs/next-auth/releases/tag/next-auth@4.24.15","https://github.com/nextauthjs/next-auth/releases/tag/next-auth@5.0.0-beta.32"],"severity":{"label":"critical"},"sources":[{"source":"osv","source_id":"GHSA-7rqj-j65f-68wh","url":"https://osv.dev/vulnerability/GHSA-7rqj-j65f-68wh"}],"summary":"Auth.js: Email normalizer validates the address before Unicode normalization, allowing a homoglyph @ bypass"}