GHSA-27qj-9gvp-8rh9

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    GHSA-27qj-9gvp-8rh9

    Published: 19 Mar 2026Last Modified: 10 Sept 2026

    Summary: Packetbeat does not properly validate an array index in multiple protocol parser components

    Details: Improper Validation of Array Index (CWE-129) in multiple protocol parser components in Packetbeat can lead Denial of Service via Input Data Manipulation (CAPEC-153). An attacker with the ability to send specially crafted, malformed network packets to a monitored network interface can trigger out-of-bounds read operations, resulting in application crashes or resource exhaustion. This requires the attacker to be positioned on the same network segment as the Packetbeat deployment or to control traffic routed to monitored interfaces.

    References: https://nvd.nist.gov/vuln/detail/CVE-2026-26933, https://github.com/elastic/beats/commit/941098459db6556b837194f40c076b08d51137cb, https://github.com/elastic/beats/commit/dec1b31111ec3500b82db21ba67dde5c914ee94d, https://discuss.elastic.co/t/packetbeat-8-19-11-9-2-5-security-update-esa-2026-11/385533, https://github.com/elastic/beats

    Affected packages

    Package

    Name: github.com/elastic/beats/v7

    Purl: pkg:golang/github.com/elastic/beats/v7

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0
    Fixed -7.0.0-alpha2.0.20260126223743-dec1b31111ec

    Affected versions

    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
    GHSA-27qj-9gvp-8rh9 | CVE-DB