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RHSA-2026:55861
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Source
https://access.redhat.com/errata/RHSA-2026:55861
Import Source
https://security.access.redhat.com/data/osv/RHSA-2026:55861.json
JSON Data
https://api.osv.dev/v1/vulns/RHSA-2026:55861
Upstream
CVE-2026-55204
Published
2026-08-18T10:21:17Z
Modified
2026-08-18T10:34:13.129972166Z
Severity
7.5 (High)
CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS Calculator
Summary
Red Hat Security Advisory: haproxy security update
Details
References
https://access.redhat.com/errata/RHSA-2026:55861
https://access.redhat.com/security/updates/classification/#important
https://bugzilla.redhat.com/show_bug.cgi?id=2490518
https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_55861.json
https://access.redhat.com/security/cve/CVE-2026-55204
https://www.cve.org/CVERecord?id=CVE-2026-55204
https://nvd.nist.gov/vuln/detail/CVE-2026-55204
https://github.com/haproxy/haproxy/commit/9a6d1fe3f00d86ab4ea6ea6ea0a5d48fc058a513
https://www.vulncheck.com/advisories/haproxy-null-pointer-dereference-in-hpack-dht-insert-function
Affected packages
Red Hat:rhel_aus:8.4::appstream
haproxy
Package
Name
haproxy
Purl
pkg:rpm/redhat/haproxy
Affected ranges
Type
ECOSYSTEM
Events
Introduced
0
Unknown introduced version / All previous versions are affected
Fixed
0:1.8.27-2.el8_4.2
Database specific
source
"https://security.access.redhat.com/data/osv/RHSA-2026:55861.json"
haproxy-debuginfo
Package
Name
haproxy-debuginfo
Purl
pkg:rpm/redhat/haproxy-debuginfo
Affected ranges
Type
ECOSYSTEM
Events
Introduced
0
Unknown introduced version / All previous versions are affected
Fixed
0:1.8.27-2.el8_4.2
Database specific
source
"https://security.access.redhat.com/data/osv/RHSA-2026:55861.json"
haproxy-debugsource
Package
Name
haproxy-debugsource
Purl
pkg:rpm/redhat/haproxy-debugsource
Affected ranges
Type
ECOSYSTEM
Events
Introduced
0
Unknown introduced version / All previous versions are affected
Fixed
0:1.8.27-2.el8_4.2
Database specific
source
"https://security.access.redhat.com/data/osv/RHSA-2026:55861.json"
Red Hat:rhel_eus_long_life:8.4::appstream
haproxy
Package
Name
haproxy
Purl
pkg:rpm/redhat/haproxy
Affected ranges
Type
ECOSYSTEM
Events
Introduced
0
Unknown introduced version / All previous versions are affected
Fixed
0:1.8.27-2.el8_4.2
Database specific
source
"https://security.access.redhat.com/data/osv/RHSA-2026:55861.json"
haproxy-debuginfo
Package
Name
haproxy-debuginfo
Purl
pkg:rpm/redhat/haproxy-debuginfo
Affected ranges
Type
ECOSYSTEM
Events
Introduced
0
Unknown introduced version / All previous versions are affected
Fixed
0:1.8.27-2.el8_4.2
Database specific
source
"https://security.access.redhat.com/data/osv/RHSA-2026:55861.json"
haproxy-debugsource
Package
Name
haproxy-debugsource
Purl
pkg:rpm/redhat/haproxy-debugsource
Affected ranges
Type
ECOSYSTEM
Events
Introduced
0
Unknown introduced version / All previous versions are affected
Fixed
0:1.8.27-2.el8_4.2
Database specific
source
"https://security.access.redhat.com/data/osv/RHSA-2026:55861.json"
RHSA-2026:55861 - OSV