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    CVE-2026-66786

    A flaw was found in submariner. In cert-auth mode, the connection configuration is built using free-form strings from the Custom Resource Definition (CRD) without proper validation. A malicious cluster can exploit this by publishing a CableName that includes newlines and ipsec.conf directives. This allows an attacker to inject arbitrary configuration parameters or execute commands through leftupdown hooks, leading to remote code execution as root on the gateway node.

    Published:Aug 21, 2026
    Last Modified:Sep 5, 2026
    EPS:Sep 2, 2026
    EPSS Score:0.00737
    CVSS Score:9.1

    Affected Products

    Vendor
    Redhat
    Product
    Acm
    Vendor
    Submariner
    Product
    Submariner

    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