CVE-2020-13950: Apache HTTP Server

High severity, CVSS 7.5. EPSS: 49.4% chance of exploitation in the next 30 days.

Apache HTTP Server versions 2.4.41 to 2.4.46 mod_proxy_http can be made to crash (NULL pointer dereference) with specially crafted requests using both Content-Length and Transfer-Encoding headers, leading to a Denial of Service

Affected products

• Apache HTTP Server: from 2.4.41, up to and including 2.4.46
• Debian Debian Linux: version 9.0 only; version 10.0 only
• Fedoraproject Fedora: version 34 only; version 35 only
• Oracle Enterprise Manager Ops Center: version 12.4.0.0 only
• Oracle Instantis Enterprisetrack: version 17.1 only; version 17.2 only; version 17.3 only
• Oracle ZFS Storage Appliance Kit: version 8.8 only

Published 2021-06-10. Last modified 2026-06-17.