CVE-2019-0190: Apache HTTP Server

High severity, CVSS 7.5. EPSS: 59.1% chance of exploitation in the next 30 days.

A bug exists in the way mod_ssl handled client renegotiations. A remote attacker could send a carefully crafted request that would cause mod_ssl to enter a loop leading to a denial of service. This bug can be only triggered with Apache HTTP Server version 2.4.37 when using OpenSSL version 1.1.1 or later, due to an interaction in changes to handling of renegotiation attempts.

Affected products

• Apache HTTP Server: version 2.4.37 only
• Oracle Enterprise Manager Ops Center: version 12.3.3 only
• Oracle Hospitality Guest Access: version 4.2.0 only; version 4.2.1 only
• Oracle Instantis Enterprisetrack: version 17.1 only; version 17.2 only; version 17.3 only
• Oracle Retail Xstore Point Of Service: version 7.0 only; version 7.1 only

Published 2019-01-30. Last modified 2026-06-17.