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    CVE-2026-35212

    OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Versions prior to 7.260227.0 are vulnerable to XSS in the rendering of email-message observable body data. The content of the body field isn't appropriately sanitized when being rendered. Does require user interaction but could be exploited by someone sharing stix or any of the ingester. This could lead to CSRF and then large scale session theft. Version 7.260227.0 contains a fix.

    Published:Jun 2, 2026
    Last Modified:Jun 5, 2026
    EPS:Jun 2, 2026
    EPSS Score:0.00047
    CVSS Score:6.1

    Affected Products

    Vendor
    Citeum
    Product
    Opencti
    Vendor
    Opencti-platform
    Product
    Opencti

    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