CVE-2026-100642
SiYuan v2.1.0 before v3.8.4 Cross-Site Request Forgery via CheckAuth
CVSS Score
7.6
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-346 |
| Vendor | siyuan-note |
| Product | siyuan |
| Published | Sep 26, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
High
Affected Versions
siyuan-note / siyuan
2.1.0 < 3.8.4
References
Credits
🔍 Yanhaoxi