Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Httpcomponents Core | >= 5.0, <= 5.4.2 |
Related Weaknesses (CWE)
References
- https://lists.apache.org/thread/zmxh1pl2zohov5ntdh4lt85gfrlchgpyMailing ListVendor Advisory
- http://www.openwall.com/lists/oss-security/2026/07/01/4Mailing ListThird Party Advisory
FAQ
What is CVE-2026-54399?
CVE-2026-54399 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 s...
How severe is CVE-2026-54399?
CVE-2026-54399 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-54399?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Httpcomponents Core.