Excessive Iteration in Tornado - CVE-2025-67725
Published: December 12, 2025
Vulnerability identifier: #VU119884
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-67725
CWE-ID: CWE-834
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Tornado
Affected software:
Tornado
Tornado
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to excessive iteration within the HTTPHeaders.add() method. A remote attacker can send a specially crafted HTTP request and perform a denial of service attack
How to mitigate CVE-2025-67725
Install updates from vendor's website.