siyuan-note SiYuan up to 3.8.0 Rendering Hint/Backlink/Breadcrumb Rendering Functions block name/alias/memo cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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6.1$0-$5k0.00+

Summaryinfo

A vulnerability labeled as problematic has been found in siyuan-note SiYuan up to 3.8.0. The impacted element is the function Hint/Backlink/Breadcrumb Rendering Functions of the component Rendering. Executing a manipulation of the argument block name/alias/memo can lead to cross site scripting. This vulnerability is tracked as CVE-2026-82654. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as problematic was found in siyuan-note SiYuan up to 3.8.0. This vulnerability affects the function Hint/Backlink/Breadcrumb Rendering Functions of the component Rendering. The manipulation of the argument block name/alias/memo with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. CVE summarizes:

SiYuan before v3.8.1 fails to properly escape block name, alias, and memo fields in hint, backlink, and breadcrumb rendering functions. Attackers can set a block's name to contain HTML/script tags that execute when another user views documents referencing or displaying that block.

The advisory is available at github.com. This vulnerability was named CVE-2026-82654 since 08/30/2026. The exploitation appears to be easy. The attack can be initiated remotely. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

Upgrading to version 3.8.1 eliminates this vulnerability.

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: 6.2
VulDB Meta Temp Score: 6.1

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.9
CNA Vector (VulnCheck): 🔒

CVSSv2info

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

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
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: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: SiYuan 3.8.1

Timelineinfo

08/30/2026 Advisory disclosed
08/30/2026 +0 days CVE reserved
08/30/2026 +0 days VulDB entry created
08/30/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-82654 (🔒)
GCVE (CVE): GCVE-0-2026-82654
GCVE (VulDB): GCVE-100-397162

Entryinfo

Created: 08/30/2026 16:49
Changes: 08/30/2026 16:49 (78)
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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