CVE-2026-54399

CVE-2026-54399: Apache HttpComponents Core: Unbounded HTTP Header/Line Length in Default Configuration

Vendor Apache Software Foundation
Product Apache HttpComponents Core
Weakness CWE-400
Published July 1, 2026
Last update July 1, 2026

CVSS base score

What the vulnerability does

01Description

Uncontrolled Resource Consumption vulnerability in the HTTP/1.1 message parser 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 messages with excessive number of headers / excessive header length

Key dates

02Disclosure timeline

July 1, 2026 CVE published
July 1, 2026 Record updated