CVE-2026-111811

Apache Traffic Server's experimental tsmemcache plugin allows unauthenticated network read, write, and deletion of the shared proxy cache. 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 4.0 9.4 Critical

Status

Awaiting Analysis - security@apache.org

Published

2026-10-21

Last modified

2026-10-26

Weaknesses

CWE-306

Affected products

• Apache Traffic Server (Apache Software Foundation)

References

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