PT-2026-54843 · Apache · Httpcomponents Core

Henry Huang + 1 · Published 2026-07-01 · Updated 2026-07-01 · CVE-2026-54428

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Apache HttpComponents Core versions prior to 5.4.3 Apache HttpComponents Core versions prior to 5.5-beta2

Description An issue exists in the HTTP/2 HPACK decoder where resources are allocated without limits or throttling. A remote attacker can cause a denial of service through memory exhaustion by sending oversized compressed header blocks before the HTTP/2 SETTINGS acknowledgement triggers the application of the configured header list size limit.

Recommendations Update Apache HttpComponents Core to version 5.4.3 or later. Update Apache HttpComponents Core to version 5.5-beta2 or later.

Exploit

Fix

DoS

Resource Exhaustion

Allocation of Resources Without Limits

Weakness Enumeration

CWE-400

CWE-770

Related Identifiers

CVE-2026-54428

Affected Products

Httpcomponents Core

References · 15

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54428.json · Exploit
• https://lists.apache.org/thread/5zjp8vczvxq19pw2rvhs21q446bhl0sd · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-54428 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-54428 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-54428 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-54428 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-54428 · Security Note
• https://cve.org/CVERecord?id=CVE-2026-54428 · Security Note
• https://osv.dev/vulnerability/CVE-2026-54428 · Vendor Advisory
• https://t.me/cveNotify/184126 · Telegram Post
• http://openwall.com/lists/oss-security/2026/07/01/3 · Note
• https://twitter.com/infoflowcloud/status/2072390052626248057 · Twitter Post
• https://twitter.com/CVEnew/status/2072388055281844568 · Twitter Post
• https://repo.maven.apache.org/maven2 · Note
• https://openwall.com/lists/oss-security/2026/07/01/3 · Note