CVE Feed

    Dashboard / CVE / CVE-2026-100635

    CVE-2026-100635

    SiYuan before v3.8.4 contains an authentication bypass vulnerability in the publish service where session cookies are issued without Secure or SameSite attributes over plaintext HTTP connections. An on-path attacker can observe a valid publish-visitor-session-id cookie from a Basic Auth exchange and replay it to access authenticated publish endpoints without knowing the account password.

    Published:Sep 26, 2026
    Last Modified:Oct 27, 2026
    EPS:Sep 26, 2026
    EPSS Score:0.00327
    CVSS Score:5.9

    Affected Products

    Vendor
    B3log
    Product
    Siyuan
    Vendor
    Siyuan
    Product
    Siyuan

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-118680 (CVSS 5.9) — SiYuan 3.8.7 through 3.8.8 fails to normalize Windows GLOBALROOT device-namespace aliases, bypassing the IsSen…
    CVE-2026-116171 (CVSS 5.9) — SiYuan 3.5.4 before 3.8.7 on Windows contains a sensitive-path denylist bypass in IsSensitivePath because the …
    CVE-2026-116170 (CVSS 6.9) — SiYuan before v3.8.7 contains an sql injection vulnerability that allows admin-token holders to read history.d…
    CVE-2026-116169 (CVSS 5.1) — SiYuan from 2.10.0 before 3.8.7 contains a stored cross-site scripting vulnerability that allows users with ed…
    CVE-2026-116168 (CVSS 6.9) — SiYuan before 3.8.7 contains a path traversal vulnerability in the MCP asset tool because validateAssetUploadP…
    CVE-2026-116167 (CVSS 7.6) — SiYuan from 2.9.0 before 3.8.7 contains a cross-site scripting vulnerability in the unauthenticated /check-aut…
    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…
    CVE-2026-109309 (CVSS 6.9) — SiYuan v3.7.0 before v3.8.6 contains an absolute path traversal vulnerability in the kernel's private plugin H…
    CVE-2026-105205 (CVSS 6.9) — SiYuan before 3.8.5 contains an information disclosure vulnerability that allows publish-mode readers to learn…

    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