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    CVE-2026-116171

    SiYuan 3.5.4 before 3.8.7 on Windows contains a sensitive-path denylist bypass in IsSensitivePath because the Windows extended-length prefix (\\?\) survives filepath.Clean and matches no forbidden prefix. Authenticated API callers can prepend the prefix to localPath in /api/import/importStdMd to copy workspace conf files, including the API token and TLS private keys, into assets served to unauthenticated clients.

    Published:Oct 25, 2026
    Last Modified:Oct 28, 2026
    EPS:Oct 25, 2026
    EPSS Score:0.0056
    CVSS Score:4.4

    Affected Products

    Vendor
    B3log
    Product
    Siyuan

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-116166 (CVSS 7.6) — SiYuan 3.6.0 before 3.8.7 accepts and persists the networkServeTLS setting but never enforces it, so the kerne…
    CVE-2026-109310 (CVSS 7.1) — SiYuan v3.1.12 before v3.8.6 fails to restrict the Sprig template function map in the /api/icon/getDynamicIcon…
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    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