SiYuan-Note SiYuan up to 3.8.4 GetDynamicIcon Endpoint Type special elements in template engine

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.81

Summaryinfo

A vulnerability classified as problematic was found in SiYuan-Note SiYuan up to 3.8.4. This impacts an unknown function of the component GetDynamicIcon Endpoint. Such manipulation of the argument Type leads to special elements in template engine. This vulnerability is traded as CVE-2026-93921. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in SiYuan-Note SiYuan up to 3.8.4. It has been rated as problematic. Affected by this issue is an unknown function of the component GetDynamicIcon Endpoint. The manipulation of the argument type with an unknown input leads to a special elements in template engine vulnerability. Using CWE to declare the problem leads to CWE-1336. The product uses a template engine to insert or process externally-influenced input, but it does not neutralize or incorrectly neutralizes special elements or syntax that can be interpreted as template expressions or other code directives when processed by the engine. Impacted is confidentiality. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-93921 since 09/18/2026. The exploitation is known to be easy. The attack may be launched remotely. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1221 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.3
VulDB Temp Score: 4.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 4.3
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Special elements in template engine
CWE: CWE-1336 / CWE-791 / CWE-790
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

09/18/2026 CVE reserved
09/18/2026 +0 days VulDB entry created
09/19/2026 +0 days Advisory disclosed
09/19/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Not defined

CVE: CVE-2026-93921 (🔒)
GCVE (CVE): GCVE-0-2026-93921
GCVE (VulDB): GCVE-100-407834

Entryinfo

Created: 09/19/2026 01:28
Changes: 09/19/2026 01:28 (75)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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