Apache Httpcomponents Core vulnerabilities

2 CVEs affecting Apache Httpcomponents Core, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2026-54428, published 2026-07-01.

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Known exploited (CISA KEV) first, then by EPSS exploit probability.

• CVE-2026-54428, published 2026-07-01. High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days. Allocation of resources without limits or throttling in the HTTP/2 HPACK decoder in Apache HttpComponents Core (5.4.2 and earlier, 5.5-beta1 and earlier) allows an remote attacker to cause a denial…
• CVE-2026-54399, published 2026-07-01. High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days. 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…