CVE-2026-54399 — Apache HttpComponents Core: Unbounded HTTP Header/Line Length in Default Configuration

Description (CNA)

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 (CNA)

Vendor / product	Versions
Apache Software Foundation / Apache HttpComponents Core	affected 5.5-alpha through 5.5-beta1; affected 5.0-alpha through 5.4.2

CWE

CWE-400

References

https://lists.apache.org/thread/zmxh1pl2zohov5ntdh4lt85gfrlchgpy

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.

CVE

No English description supplied.

http://www.openwall.com/lists/oss-security/2026/07/01/4