Vulnerability DatabaseCVE-2026-87812
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CVE-2026-87812
Published:September 09, 2026
Updated:September 22, 2026
SiYuan before v3.8.2 contains a stored cross-site scripting vulnerability in Bazaar package cards where the iconURL metadata is inserted directly into HTML img src attributes without escaping. Attackers can inject malicious URLs with event handlers that execute JavaScript in the authenticated SiYuan origin when users view Bazaar listings, enabling API requests and application state manipulation.
Affected Packages
https://github.com/siyuan-note/siyuan.git (GITHUB):
Affected version(s) >=v2.8.7 <v3.8.2
Fix Suggestion:
Update to version v3.8.2
Related Resources (3)
https://www.vulncheck.com/advisories/siyuan-before-3.8.2-stored-xss-via-bazaar-iconurl
https://nvd.nist.gov/vuln/detail/CVE-2026-87812
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-rvcf-q4h8-w6c9
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CVSS v4
Base Score:
7.4
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
ACTIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.8
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-79
EPSS
Base Score:
0.20