Bug 2496106 (CVE-2026-54428) - CVE-2026-54428 org.apache.httpcomponents.core5/httpcore5-h2: Apache HttpComponents Core: Denial of Service via oversized HTTP/2 HPACK header blocks
Summary: CVE-2026-54428 org.apache.httpcomponents.core5/httpcore5-h2: Apache HttpCompo...
Keywords:
Status: NEW
Alias: CVE-2026-54428
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-01 18:02 UTC by OSIDB Bzimport
Modified: 2026-08-21 08:46 UTC (History)
59 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:48118 0 None None None 2026-07-30 07:45:02 UTC
Red Hat Product Errata RHSA-2026:54622 0 None None None 2026-08-13 14:52:03 UTC

Description OSIDB Bzimport 2026-07-01 18:02:47 UTC 
Allocation of resources without limits or throttling in the HTTP/2 HPACK decoder in Apache HttpComponents Core (5.4.2 and earlier, 5.5-beta1 and earlier) allows an remote attacker to cause a denial of service through memory exhaustion by sending oversized compressed header blocks before the HTTP/2 SETTINGS acknowledgement causes the configured header list size limit to be applied.
Comment 4 errata-xmlrpc 2026-07-30 07:44:59 UTC 
This issue has been addressed in the following products:

  Red Hat Build of Apache Camel 4.18 for Quarkus 3.33

Via RHSA-2026:48118 https://access.redhat.com/errata/RHSA-2026:48118
Comment 5 errata-xmlrpc 2026-08-13 14:52:00 UTC 
This issue has been addressed in the following products:

  Red Hat build of Apache Camel 4.18.3 for Spring Boot 3.5.16

Via RHSA-2026:54622 https://access.redhat.com/errata/RHSA-2026:54622
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