Insufficient verification of data authenticity in next-auth - #VU138939
Published: July 21, 2026
Vulnerability identifier: #VU138939
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: N/A
CWE-ID: CWE-345
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: NextAuth.js
Affected software:
next-auth
next-auth
Detailed vulnerability description
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to OAuth state, nonce, and PKCE check cookies are not bound to the provider that created them. A remote attacker can gain persistent sign-in to the victim's account.
Remediation
Install updates from vendor's website.