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    2 vulnerabilities by bokeh

    CVE-2026-21883 (GCVE-0-2026-21883)

    Vulnerability from nvd – Published: 2026-01-08 01:20 – Updated: 2026-01-23 15:09
    VLAI
    Title
    Bokeh server applications have Incomplete Origin Validation in WebSockets
    Summary
    Bokeh is an interactive visualization library written in Python. In versions 3.8.1 and below, if a server is configured with an allowlist (e.g., dashboard.corp), an attacker can register a domain like dashboard.corp.attacker.com (or use a subdomain if applicable) and lure a victim to visit it. The malicious site can then initiate a WebSocket connection to the vulnerable Bokeh server. Since the Origin header (e.g., http://dashboard.corp.attacker.com/) matches the allowlist according to the flawed logic, the connection is accepted. Once connected, the attacker can interact with the Bokeh server on behalf of the victim, potentially accessing sensitive data, or modifying visualizations. This issue is fixed in version 3.8.2.
    Severity
    4.5 (Medium)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-1385 - Missing Origin Validation in WebSockets
    Assigner
    References
    Impacted products
    Vendor Product Version
    bokeh bokeh Affected: < 3.8.2
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-21883 (GCVE-0-2026-21883)

    Vulnerability from cvelistv5 – Published: 2026-01-08 01:20 – Updated: 2026-01-23 15:09
    VLAI
    Title
    Bokeh server applications have Incomplete Origin Validation in WebSockets
    Summary
    Bokeh is an interactive visualization library written in Python. In versions 3.8.1 and below, if a server is configured with an allowlist (e.g., dashboard.corp), an attacker can register a domain like dashboard.corp.attacker.com (or use a subdomain if applicable) and lure a victim to visit it. The malicious site can then initiate a WebSocket connection to the vulnerable Bokeh server. Since the Origin header (e.g., http://dashboard.corp.attacker.com/) matches the allowlist according to the flawed logic, the connection is accepted. Once connected, the attacker can interact with the Bokeh server on behalf of the victim, potentially accessing sensitive data, or modifying visualizations. This issue is fixed in version 3.8.2.
    Severity
    4.5 (Medium)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-1385 - Missing Origin Validation in WebSockets
    Assigner
    References
    Impacted products
    Vendor Product Version
    bokeh bokeh Affected: < 3.8.2
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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