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
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-01 18:02 UTC by OSIDB Bzimport
Modified: 2026-07-13 13:19 UTC (History)
50 users (show)

Fixed In Version:
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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.
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