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    CVE-2026-109291

    Open WebUI from 0.6.33 before 0.11.4 contains a cross-site scripting vulnerability that allows authenticated users to execute script in victims' sessions by storing javascript: URLs in citation embed_url fields. Attackers can share a crafted chat whose citation, when clicked, is passed to window.open, letting them steal localStorage.token and act as the victim.

    Published:Oct 12, 2026
    Last Modified:Oct 18, 2026
    EPS:Oct 12, 2026
    EPSS Score:0.00279
    CVSS Score:7.3

    Affected Products

    Vendor
    Open-webui
    Product
    Open-webui
    Vendor
    Openwebui
    Product
    Open Webui

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-109289 (CVSS 5.3) — Open WebUI from 0.8.8 before 0.11.4 contains an improper authorization vulnerability that allows deactivated u…
    CVE-2026-109287 (CVSS 5.3) — Open WebUI from 0.9.6 before 0.11.4 contains an authorization flaw where the knowledge base file listing does …
    CVE-2026-109285 (CVSS 2.3) — Open WebUI from 0.6.0 before 0.11.4 contains an improper access control vulnerability in has_access_to_file th…
    CVE-2026-109284 (CVSS 5.3) — Open WebUI from 0.11.0 before 0.11.4 contains an improper authorization vulnerability in the chat fork handler…
    CVE-2026-109283 (CVSS 5.3) — Open WebUI from 0.11.1 before 0.11.4 contains an authorization bypass in the OAuth token exchange endpoint, wh…
    CVE-2026-88006 (CVSS 6.5) — Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.0 until 0.11.1,…
    CVE-2026-88005 (CVSS 6.5) — Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.0 until 0.9.0, …
    CVE-2026-88002 (CVSS 6.5) — Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.5.0 until 0.11.1,…

    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