CVE-2019-20800: Cherokee-Project Cherokee

Critical severity, CVSS 9.8. EPSS: 2.1% chance of exploitation in the next 30 days.

In Cherokee through 1.2.104, remote attackers can trigger an out-of-bounds write in cherokee_handler_cgi_add_env_pair in handler_cgi.c by sending many request headers, as demonstrated by a GET request with many "Host: 127.0.0.1" headers.

Affected products

• Cherokee-Project Cherokee: up to and including 1.2.104

Published 2020-05-18. Last modified 2026-06-17.