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Highest advisory severityHigh 2 vendors · 2 advisories

CVE-2026-66257

CVE-2026-66257: 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.

NVD detail CVE.org

Vendor advisory comparison

Apache

1 advisory

Red Hat

1 advisory
  • Advisory severityHigh7.5

    High [CVE-2026-66257] Denial of Service via unbounded symbol value caching

    CVE-2026-66257Source published Source updated

    A pre-authentication attacker could leverage unbounded symbol value caching to cause resource exhaustion leading to 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 an issue with unbounded symbol value caching. This could lead to resource exhaustion, where the system runs out of available resources, ultimately causing a denial of service (DoS). A denial of service attack makes the affected system unavailable to legitimate users. This can lead to service unavailability in Red Hat products utilizing affected versions of Proton-J that expose a network endpoint. The vulnerability's impact is significant due to the potential…

    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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