CVE-2009-3586: Frank Yaul Corehttp

High severity, CVSS 7.5. EPSS: 6.4% chance of exploitation in the next 30 days.

Off-by-one error in src/http.c in CoreHTTP 0.5.3.1 and earlier allows remote attackers to cause a denial of service or possibly execute arbitrary code via an HTTP request with a long first line that triggers a buffer overflow. NOTE: this vulnerability reportedly exists because of an incorrect fix for CVE-2007-4060.

Affected products

Published 2009-12-08. Last modified 2026-06-16.