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Maven package

org.apache.httpcomponents.core5:httpcore5

Open actionable advisories and recorded vendor fixes. This public package view has no inventory attached and cannot establish whether your deployment is affected. A vendor fix never resolves your finding; verify your installed version and the source guidance.

Open advisories

1 actionable advisory, newest first. Withdrawn advisories and news are excluded. Coverage is partial.

  1. High, CVSS 7.5MavenPublished

    Apache HttpComponents Core HTTP/1 header parsing can cause memory-exhaustion denial of service

    CVE-2026-54399 · GHSA-hf6x-8p5f-cgmf

    Affected
    • Maven org.apache.httpcomponents.core5:httpcore5 < 5.4.3; >= 5.5-alpha1, < 5.5-beta2
    Fixed in
    5.4.35.5-beta2· Vendor fix available
    Issue
    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 a remote attacker to cause a denial of service through memory exhaustion by sending messages with excessive number of headers / excessive header length

    Recommended action: Upgrade to 5.5-beta2 (pre-release) or 5.4.3 by release line, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.

    Sources:github.comSource checked Evidence →