RHSA-2026:60634HighCVSS 8.9

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Published
August 27, 2026
Last Modified
November 6, 2026

🔗 CVE IDs covered (1)

📋 Description

CVE-2026-90678 — haproxy: HAProxy: HTTP Request Smuggling via HTTP/3 Multiplexer Desynchronization

🎯 Affected products4

  • Red Hat Hardened Images
  • haproxy-0:3.0.27-0.1.hum1@aarch64 as a component of Red Hat Hardened Images
  • haproxy-0:3.0.27-0.1.hum1@src as a component of Red Hat Hardened Images
  • haproxy-0:3.0.27-0.1.hum1@x86_64 as a component of Red Hat Hardened Images

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/ Workaround: To mitigate this issue, avoid configuring HAProxy with a QUIC bind listener and HTTP/3 frontend if this functionality is not strictly required. If HTTP/3 is essential, consider reviewing HAProxy configurations to prevent backend connection reuse or the use of chunked transfer encoding over HTTP/1.1 for traffic susceptible to this flaw.

🔗 References (5)