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CVE Vulnerability Details :
CVE-2026-54399
PUBLISHED
More InfoOfficial Page
Assigner-apache
Assigner Org ID-f0158376-9dc2-43b6-827c-5f631a4d8d09
View Known Exploited Vulnerability (KEV) details
Published At-01 Jul, 2026 | 17:02
Updated At-01 Jul, 2026 | 17:36
Rejected At-
▼CVE Numbering Authority (CNA)
Apache HttpComponents Core: Unbounded HTTP Header/Line Length in Default Configuration

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

Affected Products
Vendor
The Apache Software FoundationApache Software Foundation
Product
Apache HttpComponents Core
Collection URL
https://repo.maven.apache.org/maven2/
Package Name
org.apache.httpcomponents.core5:httpcore5
Default Status
unaffected
Versions
Affected
  • From 5.5-alpha through 5.5-beta1 (maven)
  • From 5.0-alpha through 5.4.2 (maven)
Problem Types
TypeCWE IDDescription
CWECWE-400CWE-400 Uncontrolled Resource Consumption
Type: CWE
CWE ID: CWE-400
Description: CWE-400 Uncontrolled Resource Consumption
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Textual description of severity
text:
important
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
finder
Henry Huang <zhuang3@paypal.com>
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://lists.apache.org/thread/zmxh1pl2zohov5ntdh4lt85gfrlchgpy
vendor-advisory
Hyperlink: https://lists.apache.org/thread/zmxh1pl2zohov5ntdh4lt85gfrlchgpy
Resource:
vendor-advisory
▼Authorized Data Publishers (ADP)
1. CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
2. CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
http://www.openwall.com/lists/oss-security/2026/07/01/4
N/A
Hyperlink: http://www.openwall.com/lists/oss-security/2026/07/01/4
Resource: N/A
Details not found