CVE Feed

    Dashboard / CVE / CVE-2026-39155

    CVE-2026-39155

    Knot DNS before 3.4.10 and 3.5.x before 3.5.4 contains a vulnerability in mod-onlinesign where the next NSEC owner name can be computed incorrectly. This can create an overly broad authenticated denial interval, allowing downstream validating resolvers using aggressive negative caching to synthesize negative answers for legitimate names and causing resolver-side denial of service.

    Published:Jul 23, 2026
    Last Modified:Aug 3, 2026
    EPS:Jul 23, 2026
    EPSS Score:0.0015
    CVSS Score:6.5

    Affected Products

    Vendor
    Knot-dns
    Product
    Knot Dns

    Exploits

    No exploit reference

    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