CVE-2025-49763: Apache Traffic Server

High severity, CVSS 7.5. EPSS: 0.7% chance of exploitation in the next 30 days.

ESI plugin does not have the limit for maximum inclusion depth, and that allows excessive memory consumption if malicious instructions are inserted. Users can use a new setting for the plugin (--max-inclusion-depth) to limit it. This issue affects Apache Traffic Server: from 10.0.0 through 10.0.5, 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.