CVE-2026-93921

SiYuan through 3.8.4 Access Control Bypass via Dynamic Icon Endpoint

Published: Sep 18, 2026Updated: Sep 21, 2026 Sources: CVE List NVDCWE-862

4.3MEDIUM

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:LPrivileges Required

Low

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:LConfidentiality

Low

I:NIntegrity

None

A:NAvailability

None

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Weaknesses

CWE-862

Affected Products

siyuan-note

commercial

siyuanOn-premDesktop App

Consumer Software / productivity

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Initial Access

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References

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-whcx-xxqh-c838

github.com

https://github.com/siyuan-note/siyuan

github.com

https://github.com/siyuan-note/siyuan/blob/v3.8.4/kernel/api/router.go#L51

github.com

and 3 more references View all →

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