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Highest advisory severityHigh 2 vendors · 2 advisories

CVE-2026-54399

CVE-2026-54399: 2 tracked advisory records across Apache, Red Hat. Compare vendor sources and published fix guidance.

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

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Vendor advisory comparison

Apache

1 advisory

Red Hat

1 advisory
  • Advisory severityHigh7.5

    High [CVE-2026-54399] org.apache.httpcomponents.core5/httpcore5: Apache HttpComponents Core: Denial of Service via excessive HTTP headers

    CVE-2026-54399Source published Source updated

    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 This can lead to memory exhaustion in applications using the affected HTTP/1.1 message parser, impacting service availability. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-770.

    Affected products in this advisory
    • Cryostat 4 on RHEL 9
    • Red Hat build of Apache Camel 4.18.3 for Spring Boot 3.5.16
    • Red Hat Build of Apache Camel 4.18 for Quarkus 3.33
    • Red Hat build of Quarkus 3.33.2.SP3

    25 more entries in the full advisory.

    Source-reported affected versions
    • 5.4.2
    Source-reported fixed versions
    • cryostat/cryostat-agent-init-rhel9:0.7.0-12
    • cryostat/cryostat-rhel9:4.2.0-14
    • httpcore
    • httpcore5

    31 more entries in the full advisory.

    Mitigation guidance
    • To mitigate this issue, configure an upstream proxy or web application firewall (WAF) to enforce limits on the number and length of HTTP headers. This prevents malformed requests from reaching and exhausting the vulnerable Apache HttpComponents Core component. Consult your proxy or WAF documentation for specific configuration. A service restart may be required for changes to take effect.
    Full advisory and evidenceOpen source bulletin

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