CVE-2025-63656: Monkey-Project Monkey

High severity, CVSS 7.5. EPSS: 1.2% chance of exploitation in the next 30 days.

An out-of-bounds read in the header_cmp function (mk_server/mk_http_parser.c) of monkey commit f37e984 allows attackers to cause a Denial of Service (DoS) via sending a crafted HTTP request to the server.

Affected products

• Monkey-Project Monkey: up to and including 1.8.5

Published 2026-01-29. Last modified 2026-06-17.