org.apache.httpcomponents.core5/httpcore5 vulnerabilities

Latest org.apache.httpcomponents.core5/httpcore5 CVEs

Newest publication first

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

   Published 2026-07-01

   High·CVSS 7.5 EPSS 0.78%

   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 he...

Sources: CVE.org, NVD, CISA KEV, FIRST EPSS, OSV and public exploit-reference metadata. Product matching comes from the published CVE records. A proof-of-concept means public code exists; it is not evidence of exploitation.