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Vulnerability Details :

CVE-2026-34585

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-31 Mar, 2026 | 21:47
Updated At-01 Apr, 2026 | 13:34
Rejected At-
Credits

SiYuan: Stored XSS in imported .sy.zip content leads to arbitrary command execution

SiYuan is a personal knowledge management system. Prior to version 3.6.2, a vulnerability allows crafted block attribute values to bypass server-side attribute escaping when an HTML entity is mixed with raw special characters. An attacker can embed a malicious IAL value inside a .sy document, package it as a .sy.zip, and have the victim import it through the normal Import -> SiYuan .sy.zip workflow. Once the note is opened, the malicious attribute breaks out of its original HTML context and injects an event handler, resulting in stored XSS. In the Electron desktop client, this XSS reaches remote code execution because injected JavaScript runs with access to Node/Electron APIs. This issue has been patched in version 3.6.2.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:31 Mar, 2026 | 21:47
Updated At:01 Apr, 2026 | 13:34
Rejected At:
▼CVE Numbering Authority (CNA)
SiYuan: Stored XSS in imported .sy.zip content leads to arbitrary command execution

SiYuan is a personal knowledge management system. Prior to version 3.6.2, a vulnerability allows crafted block attribute values to bypass server-side attribute escaping when an HTML entity is mixed with raw special characters. An attacker can embed a malicious IAL value inside a .sy document, package it as a .sy.zip, and have the victim import it through the normal Import -> SiYuan .sy.zip workflow. Once the note is opened, the malicious attribute breaks out of its original HTML context and injects an event handler, resulting in stored XSS. In the Electron desktop client, this XSS reaches remote code execution because injected JavaScript runs with access to Node/Electron APIs. This issue has been patched in version 3.6.2.

Affected Products
Vendor
siyuan-note
Product
siyuan
Versions
Affected
  • < 3.6.2
Problem Types
TypeCWE IDDescription
CWECWE-79CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWECWE-94CWE-94: Improper Control of Generation of Code ('Code Injection')
Type: CWE
CWE ID: CWE-79
Description: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Type: CWE
CWE ID: CWE-94
Description: CWE-94: Improper Control of Generation of Code ('Code Injection')
Metrics
VersionBase scoreBase severityVector
3.18.6HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Version: 3.1
Base score: 8.6
Base severity: HIGH
Vector:
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-ff66-236v-p4fg
x_refsource_CONFIRM
https://github.com/siyuan-note/siyuan/issues/17246
x_refsource_MISC
https://github.com/siyuan-note/siyuan/releases/tag/v3.6.2
x_refsource_MISC
Hyperlink: https://github.com/siyuan-note/siyuan/security/advisories/GHSA-ff66-236v-p4fg
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/siyuan-note/siyuan/issues/17246
Resource:
x_refsource_MISC
Hyperlink: https://github.com/siyuan-note/siyuan/releases/tag/v3.6.2
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-ff66-236v-p4fg
exploit
Hyperlink: https://github.com/siyuan-note/siyuan/security/advisories/GHSA-ff66-236v-p4fg
Resource:
exploit
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:31 Mar, 2026 | 22:16
Updated At:03 Apr, 2026 | 16:52

SiYuan is a personal knowledge management system. Prior to version 3.6.2, a vulnerability allows crafted block attribute values to bypass server-side attribute escaping when an HTML entity is mixed with raw special characters. An attacker can embed a malicious IAL value inside a .sy document, package it as a .sy.zip, and have the victim import it through the normal Import -> SiYuan .sy.zip workflow. Once the note is opened, the malicious attribute breaks out of its original HTML context and injects an event handler, resulting in stored XSS. In the Electron desktop client, this XSS reaches remote code execution because injected JavaScript runs with access to Node/Electron APIs. This issue has been patched in version 3.6.2.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.18.6HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Primary3.18.2HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Type: Secondary
Version: 3.1
Base score: 8.6
Base severity: HIGH
Vector:
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Type: Primary
Version: 3.1
Base score: 8.2
Base severity: HIGH
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
CPE Matches
b3log
b3log
>>siyuan>>Versions before 3.6.2(exclusive)
cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-79Secondarysecurity-advisories@github.com
CWE-94Secondarysecurity-advisories@github.com
CWE ID: CWE-79
Type: Secondary
Source: security-advisories@github.com
CWE ID: CWE-94
Type: Secondary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/siyuan-note/siyuan/issues/17246security-advisories@github.com
Issue Tracking
https://github.com/siyuan-note/siyuan/releases/tag/v3.6.2security-advisories@github.com
Release Notes
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-ff66-236v-p4fgsecurity-advisories@github.com
Exploit
Vendor Advisory
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-ff66-236v-p4fg134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit
Vendor Advisory
Hyperlink: https://github.com/siyuan-note/siyuan/issues/17246
Source: security-advisories@github.com
Resource:
Issue Tracking
Hyperlink: https://github.com/siyuan-note/siyuan/releases/tag/v3.6.2
Source: security-advisories@github.com
Resource:
Release Notes
Hyperlink: https://github.com/siyuan-note/siyuan/security/advisories/GHSA-ff66-236v-p4fg
Source: security-advisories@github.com
Resource:
Exploit
Vendor Advisory
Hyperlink: https://github.com/siyuan-note/siyuan/security/advisories/GHSA-ff66-236v-p4fg
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Resource:
Exploit
Vendor Advisory

Change History

0
Information is not available yet

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