CVE-2026-73420: Incorrect Behavior Order: Validate Before Canonicalize

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 used by the email and magic-link sign-in flow validates an address before applying Unicode normalization. An address can contain a Unicode character such as...

PT-2026-71919

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 used by the email and magic-link sign-in flow validates an address before applying Unicode normalization. An address can contain a Unicode character such as...

Incorrect Behavior Order: Validate Before Canonicalize

Overview @auth/core is an Authentication for the Web. Affected versions of this package are vulnerable to Incorrect Behavior Order: Validate Before Canonicalize in the email/magic-link sign-in process. An attacker can gain unauthorized access to a victim's account by submitting an email address...

Incorrect Behavior Order: Validate Before Canonicalize

Overview next-auth is an Authentication for Next.js Affected versions of this package are vulnerable to Incorrect Behavior Order: Validate Before Canonicalize in the email/magic-link sign-in process. An attacker can gain unauthorized access to a victim's account by submitting an email address...