CVE-2022-35924 — NextAuth

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 email

01What is this vulnerability?

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…

02Affected products

Vendor	Product	Versions
nextauthjs	next	auth — >= 4.0.0, < 4.10.3, < 3.29.10

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2022-08-02T17:55:13.000Z
• Last modified: 2025-04-23T17:54:19.705Z

09References

• next-auth.js.org — https://next-auth.js.org/configuration/initialization#advanced-initialization
• github.com — https://github.com/nextauthjs/next-auth/security/advisories/GHSA-xv97-c62v-4587
• github.com — https://github.com/nextauthjs/next-auth/commit/afb1fcdae3cc30445038ef588e491d139…
• en.wikipedia.org — https://en.wikipedia.org/wiki/Email_address#Local-part
• next-auth.js.org — https://next-auth.js.org/configuration/callbacks#sign-in-callback
• next-auth.js.org — https://next-auth.js.org/providers/email
• next-auth.js.org — https://next-auth.js.org/providers/email#normalizing-the-e-mail-address
• nodemailer.com — https://nodemailer.com/message/addresses