What the vulnerability does

01Description

A potential denial-of-service issue in the Proxygen handling of invalid HTTP2 settings which can cause the server to spend disproportionate resources. This affects all supported versions of HHVM (3.24.3 and 3.21.7 and below) when using the proxygen server to handle HTTP2 requests.

Key dates

02Disclosure timeline

December 3, 2018 CVE published
May 6, 2025 Record updated