CVE-2023-38522: Apache Traffic Server

High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days.

Apache Traffic Server accepts characters that are not allowed for HTTP field names and forwards malformed requests to origin servers. This can be utilized for request smuggling and may also lead cache poisoning if the origin servers are vulnerable. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.10, from 9.0.0 through 9.2.4. Users are recommended to upgrade to version 8.1.11 or 9.2.5, which fixes the issue.

Affected products

• Apache Traffic Server: from 8.0.0, before 8.1.11 (fixed in 8.1.11); from 9.0.0, before 9.2.5 (fixed in 9.2.5)

Published 2024-07-26. Last modified 2026-06-17.