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    CVE-2026-22813

    OpenCode is an open source AI coding agent. The markdown renderer used for LLM responses will insert arbitrary HTML into the DOM. There is no sanitization with DOMPurify or even a CSP on the web interface to prevent JavaScript execution via HTML injection. This means controlling the LLM response for a chat session gets JavaScript execution on the http://localhost:4096 origin. This vulnerability is fixed in 1.1.10.

    Published:Jan 12, 2026
    Last Modified:Apr 18, 2026
    EPS:Jan 12, 2026
    EPSS Score:0.00053
    CVSS Score:6.1

    Affected Products

    Vendor
    Anoma
    Product
    Opencode
    Vendor
    Anomalyco
    Product
    Opencode

    Exploits

    https://github.com/anomalyco/opencode/security/advisories/GHSA-c83v-7274-4vgphttps://github.com/anomalyco/opencode/security/advisories/GHSA-c83v-7274-4vgp

    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