CVE-2021-30641: Apache HTTP Server

Medium severity, CVSS 5.3. EPSS: 52.6% chance of exploitation in the next 30 days.

Apache HTTP Server versions 2.4.39 to 2.4.46 Unexpected matching behavior with 'MergeSlashes OFF'

Affected products

• Apache HTTP Server: from 2.4.39, 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.