# @auth/core (npm) vulnerabilities

3 known vulnerabilities (1 critical, 1 high, 1 medium), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: 0.41.3 (Jul 20, 2026): no advisory affects it
- Newest unaffected release: 0.41.3 (Jul 20, 2026), the latest release
- Weekly downloads: 6.4M
- Dependents: 252
- Releases: 112 since 0.1.0 (Dec 13, 2022)
- Registry: https://www.npmjs.com/package/@auth/core
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2026-73420: 0.1.0 to 0.41.2 (0.41.3 is outside it)
- CVE-2026-73419: 0.0.0-0bd14dd7c to 0.41.2 (0.41.3 is outside it)
- CVE-2026-73418: 0.1.0 to 0.41.2 (0.41.3 is outside it)

## Advisories (3)

### [CVE-2026-73420](https://cve.now/CVE-2026-73420): NextAuth.js: Email normalizer validates the address before Unicode normalization, allowing a homoglyph @ bypass

- Severity: Critical 9.1
- Published: Aug 13, 2026
- Affected: from 0.1.0, fixed in 0.41.3.
- Fixed in 0.41.3 (released Jul 20, 2026, 24 days before disclosure).
- The latest release, 0.41.3, is not affected.
- 33% of @auth/core downloads last week were affected versions (2.5M).

### [CVE-2026-73419](https://cve.now/CVE-2026-73419): NextAuth.js: OAuth state, nonce, and PKCE check cookies are not bound to the provider that created them

- Severity: Medium 6.8
- Published: Aug 12, 2026
- Affected: fixed in 0.41.3.
- Fixed in 0.41.3 (released Jul 20, 2026, 23 days before disclosure).
- The latest release, 0.41.3, is not affected.
- 33% of @auth/core downloads last week were affected versions (2.5M).

### [CVE-2026-73418](https://cve.now/CVE-2026-73418): NextAuth.js: getToken() throws an uncaught exception on malformed Bearer authorization headers

- Severity: High 7.5
- Published: Aug 12, 2026
- Affected: from 0.1.0, fixed in 0.41.3.
- Fixed in 0.41.3 (released Jul 20, 2026, 23 days before disclosure).
- The latest release, 0.41.3, is not affected.
- 33% of @auth/core downloads last week were affected versions (2.5M).

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