CVE-2026-54428 (GCVE-0-2026-54428)

Vulnerability from cvelistv5 – Published: 2026-07-01 17:03 – Updated: 2026-07-01 18:15
VLAI
Title
Apache HttpComponents Core: HPackDecoder Unlimited Header List Size Before SETTINGS ACK
Summary
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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-770 - Allocation of Resources Without Limits or Throttling
  • CWE-400 - Uncontrolled Resource Consumption
Assigner
References
Impacted products
Vendor Product Version
Apache Software Foundation Apache HttpComponents Core Affected: 5.5-alpha , ≤ 5.5-beta1 (maven)
Affected: 5.0-alpha , ≤ 5.4.2 (maven)
Create a notification for this product.
Credits
Henry Huang <zhuang3@paypal.com>
Show details on NVD website
To clipboard 

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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