Input validation error in next-auth - #VU138945
Published: July 21, 2026
Vulnerability identifier: #VU138945
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to improper input validation in the email sign-in flow when processing email-based authentication requests. A remote user can submit a crafted email sign-in request to disclose sensitive information.
Affected software
next-auth
Remediation
Install security update from vendor's website.
next-auth - addressed in versions 4.24.12, 5.0.0 beta.30