RHSA-2026:55862: Important: haproxy security update
Important: haproxy security update
Other sources
The haproxy packages provide a reliable, high-performance network load balancer for TCP and HTTP-based applications.Security Fix(es): haproxy: HAProxy: Denial of Service via HPACK dynamic table insertions (CVE-2026-55204) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
— Red Hat
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
redhat/haproxyto a version that resolves this vulnerability.Fixed in 1.8.27-4.el8_6.2 - Upgrade
Upgrade
redhat/haproxy-debuginfoto a version that resolves this vulnerability.Fixed in 1.8.27-4.el8_6.2 - Upgrade
Upgrade
redhat/haproxy-debugsourceto a version that resolves this vulnerability.Fixed in 1.8.27-4.el8_6.2
Event History
Frequently Asked Questions
What is the severity of RHSA-2026:55862?
The severity of RHSA-2026:55862 is classified as high with a score of 7.
What is the main security issue addressed in RHSA-2026:55862?
RHSA-2026:55862 addresses a Denial of Service vulnerability in HAProxy due to HPACK dynamic table insertions (CVE-2026-55204).
How do I fix RHSA-2026:55862?
To fix RHSA-2026:55862, it is recommended to update the HAProxy packages to the latest version provided in the security update.
Who is affected by the vulnerability in RHSA-2026:55862?
The vulnerability in RHSA-2026:55862 affects users of the HAProxy package on Red Hat Enterprise Linux platforms.
What impact does RHSA-2026:55862 have on my system?
The impact of RHSA-2026:55862 can result in a Denial of Service for applications using HAProxy, potentially disrupting access to these services.