CVE-2026-111808

Apache Traffic Server can be used to exhaust an HTTP/1.1 origin's worker pool via a malformed padded HTTP/2 DATA frame. 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 8.6 High

Status

Awaiting Analysis - security@apache.org

Published

2026-10-21

Last modified

2026-10-23

Weaknesses

CWE-191

Affected products

• Apache Traffic Server (Apache Software Foundation)

References

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