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CVE PROGRAM SOURCE RECORD7.2 High

CVE-2026-100642

SiYuan v2.1.0 before v3.8.4 Cross-Site Request Forgery via CheckAuth

Description

SiYuan versions from v2.1.0 before v3.8.4 contain a cross-site request forgery vulnerability in the CheckAuth lock-screen pass-through branch that grants administrator access to loopback requests without validating Origin headers. Attackers can craft malicious web pages that force victims to terminate the kernel process, read workspace configuration and proxy settings, and trigger administrative actions via zero-credential cross-origin requests from the victim's browser.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

siyuan-note siyuan

Default version status: unaffected

  • 2.1.0 to < 3.8.4affected
  • 3.8.4unaffected

References