CVE-2017-7674: Apache Tomcat

Medium severity, CVSS 4.3. EPSS: 8% chance of exploitation in the next 30 days.

The CORS Filter in Apache Tomcat 9.0.0.M1 to 9.0.0.M21, 8.5.0 to 8.5.15, 8.0.0.RC1 to 8.0.44 and 7.0.41 to 7.0.78 did not add an HTTP Vary header indicating that the response varies depending on Origin. This permitted client and server side cache poisoning in some circumstances.

Affected products

• Apache Tomcat: version 7.0.41 only; version 7.0.42 only; version 7.0.43 only; version 7.0.44 only; version 7.0.45 only; version 7.0.46 only; …

Published 2017-08-11. Last modified 2026-06-17.