CVE-2023-28708: Apache Tomcat

Medium severity, CVSS 4.3. EPSS: 1.8% chance of exploitation in the next 30 days.

When using the RemoteIpFilter with requests received from a reverse proxy via HTTP that include the X-Forwarded-Proto header set to https, session cookies created by Apache Tomcat 11.0.0-M1 to 11.0.0.-M2, 10.1.0-M1 to 10.1.5, 9.0.0-M1 to 9.0.71 and 8.5.0 to 8.5.85 did not include the secure attribute. This could result in the user agent transmitting the session cookie over an insecure channel. Older, EOL versions may also be affected.

Affected products

• Apache Tomcat: from 8.5.0, before 8.5.86 (fixed in 8.5.86); after 9.0.0, before 9.0.72 (fixed in 9.0.72); after 10.1.0, before 10.1.6 (fixed in 10.1.6); version 11.0.0 only

Published 2023-03-22. Last modified 2026-06-17.