CVE-2026-54428: CWE-770: Allocation of Resources Without Limits or Throttling in Apache Software Foundation Apache HttpComponents Core
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.
AI Analysis
Technical Summary
This vulnerability in Apache HttpComponents Core (versions 5.5-alpha and 5.0-alpha) arises from the HTTP/2 HPACK decoder allocating resources without enforcing limits or throttling. An attacker can exploit this by sending oversized compressed header blocks before the HTTP/2 SETTINGS acknowledgement triggers the configured header list size limit, resulting in memory exhaustion and denial of service.
Potential Impact
A remote attacker can cause a denial of service condition through memory exhaustion by exploiting the lack of resource allocation limits in the HTTP/2 HPACK decoder. This can disrupt service availability of applications using the affected versions of Apache HttpComponents Core.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been provided at this time.
CVE-2026-54428: CWE-770: Allocation of Resources Without Limits or Throttling in Apache Software Foundation Apache HttpComponents Core
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.
CVSS v3.1
Score 7.5high
Affected software
pkg:maven/Apache Software Foundation/org.apache.httpcomponents.core5:httpcore5-h2Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Apache HttpComponents Core (versions 5.5-alpha and 5.0-alpha) arises from the HTTP/2 HPACK decoder allocating resources without enforcing limits or throttling. An attacker can exploit this by sending oversized compressed header blocks before the HTTP/2 SETTINGS acknowledgement triggers the configured header list size limit, resulting in memory exhaustion and denial of service.
Potential Impact
A remote attacker can cause a denial of service condition through memory exhaustion by exploiting the lack of resource allocation limits in the HTTP/2 HPACK decoder. This can disrupt service availability of applications using the affected versions of Apache HttpComponents Core.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been provided at this time.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-06-14T09:39:30.814Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a4553d327e9c79719e35e77
Added to database: 07/01/2026, 17:52:19 UTC
Last enriched: 07/01/2026, 18:07:19 UTC
Last updated: 07/01/2026, 22:01:36 UTC
Views: 16
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