RHSA-2026:60634HighCVSS 8.9
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
🔗 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)
- selfhttps://access.redhat.com/errata/RHSA-2026:60634
- externalhttps://images.redhat.com/
- externalhttps://access.redhat.com/security/cve/CVE-2026-90678
- externalhttps://access.redhat.com/security/updates/classification/
- selfhttps://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_60634.json