CVE-2026-54399
Apache HttpComponents Core: Unbounded HTTP Header/Line Length in Default Configuration
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
INFO
Published Date :
July 1, 2026, 5:02 p.m.
Last Modified :
July 1, 2026, 5:02 p.m.
Remotely Exploit :
No
Source :
apache
Affected Products
The following products are affected by CVE-2026-54399
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update Apache HttpComponents Core to a non-vulnerable version.
- Apply vendor-provided patches.
- Configure message size limits.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-54399 vulnerability anywhere in the article.