CVE-2018-11469: Canonical Ubuntu Linux

Medium severity, CVSS 5.9. EPSS: 2.9% chance of exploitation in the next 30 days.

Incorrect caching of responses to requests including an Authorization header in HAProxy 1.8.0 through 1.8.9 (if cache enabled) allows attackers to achieve information disclosure via an unauthenticated remote request, related to the proto_http.c check_request_for_cacheability function.

Affected products

• Canonical Ubuntu Linux: version 18.04 only
• Haproxy Haproxy: from 1.8.0, up to and including 1.8.9

Published 2018-05-25. Last modified 2026-06-17.