CVE-2026-74904
SiYuan before v3.7.4 Missing Authorization via block API
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
SiYuan before v3.7.4 is missing authorization checks in 17 block metadata/content endpoints in kernel/api/block.go (including getRefText, checkBlockExist, and getBlockBreadcrumb). These handlers are gated only by basic authentication (model.CheckAuth) and lack publish-access filtering, allowing anonymous publish-mode readers to disclose private block content-derived text, structural metadata, and existence information for arbitrary block IDs across the workspace.
| CWE | CWE-862 |
| Vendor | siyuan-note |
| Product | siyuan |
| Published | Aug 18, 2026 |
| Last Updated | Aug 18, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
siyuan-note / siyuan
0 < 3.7.4
References
Credits
🔍 alham-rizvi