Input validation error in next-auth - CVE-2026-73418
Published: July 21, 2026 / Updated: August 13, 2026
Vulnerability identifier: #VU138927
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-73418
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input in the getToken() helper. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.
Affected software
next-auth
How to mitigate CVE-2026-73418
Install updates from vendor's website.
next-auth - addressed in versions 4.24.15, 5.0.0 beta.32