CVE-2026-54428 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable yes

Technical Impact partial

No data.

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No data.

References

Link	Providers
https://lists.apache.org/thread/5zjp8vczvxq19pw2rvhs21q446bhl0sd

History

Wed, 01 Jul 2026 19:30:00 +0000

Type	Values Removed	Values Added
Metrics		cvssV3_1 `{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}` ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Wed, 01 Jul 2026 17:45:00 +0000

Type	Values Removed	Values Added
Description		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.
Title		Apache HttpComponents Core: HPackDecoder Unlimited Header List Size Before SETTINGS ACK
Weaknesses		CWE-400 CWE-770
References		https://lists.apache.org/thread/5zjp8vczvxq19pw2rvhs21q446bhl0sd

MITRE

Status: PUBLISHED

Assigner: apache

Published: 2026-07-01T17:03:53.938Z

Updated: 2026-07-01T18:15:56.634Z

Reserved: 2026-06-14T09:39:30.814Z

Link: CVE-2026-54428

Vulnrichment

Updated: 2026-07-01T17:36:48.420Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

No data.

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