CVE-2026-54399CWE-400
Apache HttpComponents Core: Unbounded HTTP Header/Line Length in Default Configuration
High · published July 1, 2026
What it is
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
The record
Technical detail
- CVSS v3.1
- 7.5 · HIGH
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS v4.0
- Not supplied
- EPSS
- 0.00779 · 55.4th percentile
- Weakness
- CWE-400 · Uncontrolled Resource Consumption
- Published
- 2026-07-01T17:02Z
EPSS history
Timeline