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    CVE-2026-27878

    A TraceQL query in Grafana Tempo with a large exemplars hint value can cause the Tempo instance to allocate an excessive amount of memory, resulting in an out-of-memory crash. This could allow an authenticated user to trigger a denial of service against the Tempo service.

    Published:Jun 19, 2026
    Last Modified:Jun 24, 2026
    EPS:Jun 19, 2026
    EPSS Score:0.00235
    CVSS Score:6.5

    Affected Products

    Vendor
    Grafana
    Product
    Enterprise Metrics
    Vendor
    Grafana
    Product
    Tempo

    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