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Highest advisory severityHigh 2 vendors · 2 advisories

CVE-2026-66273

CVE-2026-66273: 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-2026-66273] Denial of Service due to excessive allocation

    CVE-2026-66273Source published Source updated

    A pre-authentication attacker could leverage type size/count handling to cause excessive allocation leading to potential denial of service. This issue affects Apache Qpid Proton-J: through 0.34.1. Users are recommended to upgrade to version 0.35.0, which fixes the issue. A remote attacker, without needing to authenticate, could exploit a vulnerability in how the software handles type sizes and counts. This could lead to excessive memory allocation, causing the system to become unresponsive and resulting in a denial of service. By sending specially crafted messages, an attacker can trigger excessive memory allocation, leading to resource exhaustion in applications utilizing the library within Red Hat products such as AMQ, Quarkus, Camel, and EAP. Red Hat severity: Important — CVSS 7.5…

    Affected products in this advisory
    • Red Hat AMQ Broker 7.13.6
    • Red Hat AMQ Broker 7.14.1
    • Red Hat AMQ Clients
    • Red Hat build of Apache Camel 4 for Quarkus 3

    2 more entries in the full advisory.

    Source-reported affected versions
    • 0.34.1
    Source-reported fixed versions
    • 0.35.0
    • proton-j
    • RHSA-2026:66545
    • RHSA-2026:66488
    Mitigation guidance
    • Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    Full advisory and evidenceOpen source bulletin

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