CVE-2026-54399: CWE-400 Uncontrolled Resource Consumption in Apache Software Foundation Apache HttpComponents Core
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
AI Analysis
Technical Summary
The vulnerability in Apache HttpComponents Core's HTTP/1.1 message parser allows an attacker to cause denial of service via memory exhaustion. This occurs when the parser processes HTTP messages containing an excessive number of headers or headers with excessive length. The affected versions explicitly include 5.5-alpha and 5.0-alpha. No CVSS score or vendor advisory detailing remediation is currently available.
Potential Impact
Successful exploitation leads to denial of service due to uncontrolled memory consumption in the HTTP/1.1 message parser. This can disrupt availability of applications relying on the affected Apache HttpComponents Core versions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider implementing network-level protections such as limiting header sizes and counts if possible, or deploying upstream filtering to mitigate potential attacks.
CVE-2026-54399: CWE-400 Uncontrolled Resource Consumption in Apache Software Foundation Apache HttpComponents Core
Description
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
CVSS v3.1
Score 7.5high
Affected software
pkg:maven/Apache Software Foundation/org.apache.httpcomponents.core5:httpcore5Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in Apache HttpComponents Core's HTTP/1.1 message parser allows an attacker to cause denial of service via memory exhaustion. This occurs when the parser processes HTTP messages containing an excessive number of headers or headers with excessive length. The affected versions explicitly include 5.5-alpha and 5.0-alpha. No CVSS score or vendor advisory detailing remediation is currently available.
Potential Impact
Successful exploitation leads to denial of service due to uncontrolled memory consumption in the HTTP/1.1 message parser. This can disrupt availability of applications relying on the affected Apache HttpComponents Core versions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider implementing network-level protections such as limiting header sizes and counts if possible, or deploying upstream filtering to mitigate potential attacks.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-06-13T10:04:54.084Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a45492b27e9c79719d62118
Added to database: 07/01/2026, 17:06:51 UTC
Last enriched: 07/01/2026, 17:22:57 UTC
Last updated: 07/01/2026, 21:26:08 UTC
Views: 27
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.