GHSA-xv97-c62v-4587 · Severity: critical · Ecosystem: npm — NextAuth.js before 4.10.3 and 3.29.10 sending verification requests (magic link) to unwanted emails
NextAuth.js is a complete open source authentication solution for Next.js applications. `next-auth` users who are using the `EmailProvider` either in versions before `4.10.3` or `3.29.10` are affected. If an attacker could forge a request that sent a comma-separated list of emails (eg.: `[email protected],[email protected]`) to the sign-in endpoint, NextAuth.js would send emails to both the attacker and the victim's e-mail addresses. The attacker could then login as a newly created user with the email being `[email protected],[email protected]`. This means that basic authorization like `email.endsWith("@victim.com")` in the `signIn` callback would fail to communicate a threat to the developer and would let the attacker bypass authorization, even with an `@attacker.com` address. This vulnerability has been patched in `v4.10.3` and `v3.29.10` by normalizing the email value that is sent to the sign-in endpoint before accessing it anywhere else. We also added a `normalizeIdentifier` callback on the `EmailProvider` configuration, where you can further tweak your requirements for what your system considers a valid e-mail address. (E.g.: strict RFC2821 compliance). Users are advised to upgrade. There are no known workarounds for this vulnerability. If for some reason you cannot upgrade, you can normalize the incoming request using Advanced Initialization.
Conclusion & alert: CVE-2022-35924 is rated Moderate Risk (57.8/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.42%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2025-11-21 | 0.49% | 0.42% | -0.07% |
| 2 | 2025-11-18 | 0.39% | 0.49% | +0.10% |
| 3 | 2025-08-08 | — | 0.39% | — |
Full EPSS history (15 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 9.1 | 3.1 | CRITICAL |
|
3.9 | 5.2 | [email protected] |
| 9.1 | 3.1 | CRITICAL |
|
3.9 | 5.2 | [email protected] |
GHSA-xv97-c62v-4587 · Severity: critical · Ecosystem: npm — NextAuth.js before 4.10.3 and 3.29.10 sending verification requests (magic link) to unwanted emails
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| nextauth.js | next-auth | < 3.29.10 | cpe:2.3:a:nextauth.js:next-auth:*:*:*:*:*:node.js:*:* |
| nextauth.js | next-auth | >= 4.0.0, < 4.10.3 | cpe:2.3:a:nextauth.js:next-auth:*:*:*:*:*:node.js:*:* |
| URL | Tags |
|---|---|
| https://en.wikipedia.org/wiki/Email_address#Local-part | Third Party Advisory |
| https://github.com/nextauthjs/next-auth/commit/afb1fcdae3cc30445038ef588e491d139b916003 | Patch Third Party Advisory |
| https://github.com/nextauthjs/next-auth/security/advisories/GHSA-xv97-c62v-4587 | Mitigation Third Party Advisory |
| https://next-auth.js.org/configuration/callbacks#sign-in-callback | Vendor Advisory |
| https://next-auth.js.org/configuration/initialization#advanced-initialization | Vendor Advisory |
| https://next-auth.js.org/providers/email | Vendor Advisory |
| https://next-auth.js.org/providers/email#normalizing-the-e-mail-address | Vendor Advisory |
| https://nodemailer.com/message/addresses | Third Party Advisory |