CVE-2026-111809

Apache Traffic Server allows request smuggling via HEAD requests that carry Content-Length or Transfer-Encoding. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.11, from 9.0.0 through 9.2.15, from 10.0.0 through 10.1.4, 10.2.0. Users are recommended to upgrade to version 9.2.16, 10.1.5, or 10.2.1, which fix the issue.

Score

CVSS 3.1 9.3 Critical

Status

Awaiting Analysis - security@apache.org

Published

2026-10-21

Last modified

2026-10-28

Weaknesses

CWE-444

Affected products

• Apache Traffic Server (Apache Software Foundation)

References

• https://lists.apache.org/thread/r95dq29ywcd1f4x30snxlqmb12z4s4kc