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Highest advisory severityHigh 2 vendors · 2 advisories

CVE-2026-50734

CVE-2026-50734: 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
  • Advisory severityHigh7.5

    High [CVE-2026-50734] Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All

    CVE-2026-50734Source published Source updated

    Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All. An unauthenticated network attacker can cause a broker DoS by sending a crafted WireFormatInfo frame with a malicious large size value. The value is not validate and causes the broker to attempt allocation during pre-auth negotiation which can trigger OOM and crash the broker. This issue affects Apache ActiveMQ Client: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ All: before 5.19.8, from 6.0.0 before 6.2.7. Users are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue.

    Affected products in this advisory
    • Apache ActiveMQ Client
    • Apache ActiveMQ All
    Source-reported affected versions
    • 6.0.0 through 6.2.7
    • 6.0.0 through 6.2.7.
    Source-reported fixed versions
    • 6.2.7
    • 5.19.8
    Mitigation guidance
    No mitigation guidance extracted; consult the source.
    Full advisory and evidenceOpen source bulletin

Red Hat

1 advisory
  • Advisory severityHigh7.5

    High [CVE-2026-50734] Denial of Service via crafted WireFormatInfo frame

    CVE-2026-50734Source published Source updated

    Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All. An unauthenticated network attacker can cause a broker DoS by sending a crafted WireFormatInfo frame with a malicious large size value. The value is not validate and causes the broker to attempt allocation during pre-auth negotiation which can trigger OOM and crash the broker. Users are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue. Consequently, this can lead to an Out Of Memory (OOM) error, resulting in a Denial of Service (DoS) and crashing the broker. A flaw was found in Apache ActiveMQ Classic's OpenWire protocol handling. 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…

    Affected products in this advisory
    • AMQ Clients 2026.Q3
    • Red Hat AMQ Broker 7.13.6
    • Red Hat AMQ Broker 7.14.1
    • Red Hat AMQ Clients

    2 more entries in the full advisory.

    Source-reported affected versions
    • < 5.19.8
    • < 6.0.0
    • < 6.2.7
    Source-reported fixed versions
    • 6.2.7
    • 5.19.8
    • artemis-core-client
    • activemq-client

    3 more entries in the full advisory.

    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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