Insufficient verification of data authenticity in next-auth - CVE-2026-73419
Published: July 21, 2026 / Updated: August 13, 2026
Vulnerability identifier: #VU138939
CSH Severity: High
CVSS v4: 7.4 [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]
CVE-ID: CVE-2026-73419
CWE-ID: CWE-345
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
next-auth
How to mitigate CVE-2026-73419
Install updates from vendor's website.
next-auth - addressed in versions 4.24.15, 5.0.0 beta.32