GitHub Advisoryadvisory · Maven

GHSA-v3jc-474w-2wm6 Apache HttpComponents Core: HPackDecoder Unlimited Header List Size Before SETTINGS ACK

HIGH Published 2026-07-01 Modified 2026-08-13 Official page ↗
Aliases
CVE-2026-54428
Ecosystem
Maven
Packages
org.apache.httpcomponents.core5:httpcore5-h2
Severity
High
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-400
Reviewed
2026-08-13

Affected packages

• Maven org.apache.httpcomponents.core5:httpcore5-h2: < 5.4.3 → fixed in 5.4.3 • Maven org.apache.httpcomponents.core5:httpcore5-h2: >= 5.5-alpha1, < 5.5-beta2 → fixed in 5.5-beta2

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.

Related

Alias · CVE (1)

  • CVE-2026-54428 Allocation of resources without limits or throttling in the HTTP/2 HPACK decoder in Apache HttpComponents Core (5.4.2 and earlier,… vulnerability

Weakness · CWE (1)

  • CWE-400 Uncontrolled Resource Consumption weakness

References