UBUNTU-CVE-2026-120956

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    UBUNTU-CVE-2026-120956

    Published: 3 Nov 2026Last Modified: 5 Nov 2026
    Upstream:
    CVE-2026-120956

    Summary:

    Details: The MongoDB C Driver does not validate the type or format of a namespace field returned by the server in a query response. A MongoDB endpoint that a client application connects to, without needing any credentials, can return a malformed value in that field. This causes the client application process to terminate, and can also cause the driver to read memory outside an allocated buffer and to send a small amount of the application's own uninitialized heap memory back to the endpoint in a follow-up command. The impact is limited to the process that embeds the driver.

    References: https://ubuntu.com/security/CVE-2026-120956, https://www.cve.org/CVERecord?id=CVE-2026-120956, https://jira.mongodb.org/browse/CDRIVER-6501

    Affected packages

    Package

    Name: mongo-c-driver

    Purl: pkg:deb/ubuntu/mongo-c-driver?arch=source&distro=esm-apps%2Ffocal

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1.15.0-1
    1.15.1-1
    1.15.2-1

    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
    UBUNTU-CVE-2026-120956 | CVE-DB