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    CVE-2026-66257

    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.

    Published:Aug 5, 2026
    Last Modified:Aug 6, 2026
    EPS:Aug 5, 2026
    EPSS Score:0.00192
    CVSS Score:7.5

    Affected Products

    Vendor
    Apache
    Product
    Qpid Proton-j

    Exploits

    No exploit reference

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High