CVE-2026-93921 Details
Description
SiYuan versions through 3.8.4 fail to enforce publish access control in the getDynamicIcon endpoint, allowing read-only token holders to access document metadata. Attackers can call the endpoint with type=8 and crafted content to read block titles, names, aliases, and hierarchical paths of restricted documents via template injection.
A vulnerability exists in SiYuan versions through 3.8.4, where the application fails to properly enforce access controls in the 'getDynamicIcon' endpoint. This oversight allows users with read-only tokens to access metadata from documents that should be restricted. The issue arises because the endpoint does not check for publish access before processing requests. As a result, attackers can exploit this by injecting templates that, when rendered, reveal sensitive information such as block titles, names, aliases, and hierarchical paths of documents that are password-protected, disabled, or locked in an encrypted notebook.
Users are advised to update to SiYuan version 3.8.5 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 19, 2026CISA-ADP
Assessed Sep 21, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/siyuan-note/siyuan/security/advisories/GHSA-whcx-xxqh-c838 | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/siyuan-note/siyuan | [email protected] | Vendor |
| https://github.com/siyuan-note/siyuan/blob/v3.8.4/kernel/api/icon.go#L546-L549 | [email protected] | Source CodeVendor |
| https://github.com/siyuan-note/siyuan/blob/v3.8.4/kernel/api/router.go#L51 | [email protected] | Source CodeVendor |
| https://github.com/siyuan-note/siyuan/blob/v3.8.4/kernel/model/template.go#L485-L526 | [email protected] | Source CodeVendor |
| https://github.com/siyuan-note/siyuan/security/advisories/GHSA-whcx-xxqh-c838 | [email protected] | AdvisoryExploitRemedyVendor |
| https://www.vulncheck.com/advisories/siyuan-through-3.8.4-access-control-bypass-via-dynamic-icon-endpoint | [email protected] | AdvisoryBundleRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-862 | Missing Authorization | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| SiYuan | <= 3.8.4 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 21, 2026 | CVE Modified | CISA-ADP |
| Sep 19, 2026 | New CVE Received | [email protected] |