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    2 vulnerabilities by Legora

    CVE-2026-74234 (GCVE-0-2026-74234)

    Vulnerability from nvd – Published: 2026-08-17 19:38 – Updated: 2026-08-17 19:55
    VLAI
    Title
    Legora < 2026-08-14 XSS via Mermaid gray-matter JavaScript Engine
    Summary
    Legora before 2026-08-14 contains a cross-site scripting vulnerability that allows attackers to achieve arbitrary JavaScript execution in a victim's browser by embedding a Mermaid block prefixed with a gray-matter JavaScript front-matter directive, causing the front-matter parser to invoke eval() before any SVG sanitization occurs. Attackers can exploit this flaw through influenced Mermaid diagram content to execute arbitrary JavaScript in the user's browser context, with elevated impact on Word and Outlook add-in surfaces where bearer session tokens are persisted in localStorage.
    Severity
    5.1 (Medium)
    CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
    7.7 (High)
    CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-17 19:55 UTC
    CWE
    • CWE-95 - Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
    Assigner
    References
    Impacted products
    Vendor Product Version
    Legora Legora Affected: 0 , < 2026-08-14 (date)
    		Create a notification for this product.
    Date Public
    2026-08-17 00:00
    Credits
    Mobasi Security Team
    Show details on NVD website
    To clipboard 

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    CVE-2026-74234 (GCVE-0-2026-74234)

    Vulnerability from cvelistv5 – Published: 2026-08-17 19:38 – Updated: 2026-08-17 19:55
    VLAI
    Title
    Legora < 2026-08-14 XSS via Mermaid gray-matter JavaScript Engine
    Summary
    Legora before 2026-08-14 contains a cross-site scripting vulnerability that allows attackers to achieve arbitrary JavaScript execution in a victim's browser by embedding a Mermaid block prefixed with a gray-matter JavaScript front-matter directive, causing the front-matter parser to invoke eval() before any SVG sanitization occurs. Attackers can exploit this flaw through influenced Mermaid diagram content to execute arbitrary JavaScript in the user's browser context, with elevated impact on Word and Outlook add-in surfaces where bearer session tokens are persisted in localStorage.
    Severity
    5.1 (Medium)
    CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
    7.7 (High)
    CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-17 19:55 UTC
    CWE
    • CWE-95 - Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
    Assigner
    References
    Impacted products
    Vendor Product Version
    Legora Legora Affected: 0 , < 2026-08-14 (date)
    		Create a notification for this product.
    Date Public
    2026-08-17 00:00
    Credits
    Mobasi Security Team
    Show details on NVD website
    To clipboard 

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