CVE-2026-87812

Medium

Description

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.

SeverityMedium

CVSS6.8

Exploit probability—

ProductSiyuan

PublishedSep 9, 2026

First seenSep 9, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Update

siyuan-note siyuan3.8.2 or later

Vendor advisories

github.com/siyuan-note/siyuan/security/advisories/GHSA-rvcf-q4h8-w6c9

Affected products

Product	Affected versions	Fixed in
siyuan-note siyuan	v < 3.8.2	3.8.2

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