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VULNERABILITIES

CVE-2026-54428 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: CISA-ADPCVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
http://www.openwall.com/lists/oss-security/2026/07/01/3 CVEMitigationThird Party Advisory
https://lists.apache.org/thread/5zjp8vczvxq19pw2rvhs21q446bhl0sd [email protected]MitigationVendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-400Uncontrolled Resource Consumption[email protected]
CWE-770Allocation of Resources Without Limits or Throttling[email protected]

Affected Products

ProductVersions
apache httpcomponents core
>= 5.0, <= 5.4.2
5.5 alpha1
5.5 beta1

CPE

  • cpe:2.3:a:apache:httpcomponents_core:*:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:httpcomponents_core:5.5:alpha1:*:*:*:*:*:*
  • cpe:2.3:a:apache:httpcomponents_core:5.5:beta1:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

5 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-54428
NVD Published Date:
Jul 1, 2026
NVD Last Modified:
Jul 24, 2026
Source:
[email protected]
CVE-2026-54428 Details - Not Deferred