CVE-2025-31698: Apache Traffic Server

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

ACL configured in ip_allow.config or remap.config does not use IP addresses that are provided by PROXY protocol. Users can use a new setting (proxy.config.acl.subjects) to choose which IP addresses to use for the ACL if Apache Traffic Server is configured to accept PROXY protocol.  This issue affects undefined: from 10.0.0 through 10.0.6, from 9.0.0 through 9.2.10. Users are recommended to upgrade to version 9.2.11 or 10.0.6, which fixes the issue.

Affected products

• Apache Traffic Server: from 9.0.0, before 9.2.11 (fixed in 9.2.11); from 10.0.0, before 10.0.6 (fixed in 10.0.6)

Published 2025-06-19. Last modified 2026-06-17.