CVE-2026-100642 SiYuan v2.1.0 before v3.8.4 Cross-Site Request Forgery via CheckAuth

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...