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    CVE-2026-28509

    LangBot is a global IM bot platform designed for LLMs. Prior to version 4.8.7, LangBot’s web UI renders user-supplied raw HTML using rehypeRaw, which can lead to a cross-site scripting (XSS) vulnerability. This issue has been patched in version 4.8.7.

    Published:Mar 6, 2026
    Last Modified:Apr 17, 2026
    EPS:Mar 6, 2026
    EPSS Score:0.00037
    CVSS Score:6.3

    Affected Products

    Vendor
    Langbot
    Product
    Langbot

    Exploits

    https://github.com/langbot-app/LangBot/security/advisories/GHSA-w8gq-g4pc-xh3h

    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