CVE-2026-93921: Missing Authorization in siyuan-note siyuan
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.
AI Analysis
Technical Summary
CVE-2026-93921 describes a missing authorization vulnerability in SiYuan note software versions up to 3.8.4. The getDynamicIcon endpoint does not enforce publish access control, enabling read-only token holders to access sensitive document metadata. Attackers can exploit this by invoking the endpoint with type=8 and specially crafted content to perform template injection, thereby reading block titles, names, aliases, and hierarchical paths of restricted documents.
Potential Impact
The vulnerability allows unauthorized disclosure of document metadata to users with read-only tokens. While it does not grant modification or deletion rights, the exposure of document structure and metadata could aid attackers in further reconnaissance or targeted attacks. There is no indication of active exploitation in the wild.
Mitigation Recommendations
No official patch or remediation information is provided. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict read-only token usage and monitor for unusual access patterns to the getDynamicIcon endpoint.
CVE-2026-93921: Missing Authorization in siyuan-note siyuan
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.
CVSS v4.0
Score 5.3medium
Affected software
siyuan-note
siyuan
pkg:golang/github.com/siyuan-note/siyuan/kernelRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-93921 describes a missing authorization vulnerability in SiYuan note software versions up to 3.8.4. The getDynamicIcon endpoint does not enforce publish access control, enabling read-only token holders to access sensitive document metadata. Attackers can exploit this by invoking the endpoint with type=8 and specially crafted content to perform template injection, thereby reading block titles, names, aliases, and hierarchical paths of restricted documents.
Potential Impact
The vulnerability allows unauthorized disclosure of document metadata to users with read-only tokens. While it does not grant modification or deletion rights, the exposure of document structure and metadata could aid attackers in further reconnaissance or targeted attacks. There is no indication of active exploitation in the wild.
Mitigation Recommendations
No official patch or remediation information is provided. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict read-only token usage and monitor for unusual access patterns to the getDynamicIcon endpoint.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-18T21:56:59.671Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aadc9f655bf5e2cf5afb79e
Added to database: 09/18/2026, 23:32:06 UTC
Last enriched: 09/18/2026, 23:46:38 UTC
Last updated: 09/19/2026, 02:42:45 UTC
Views: 9
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