SEPTEMBER 15, 2026
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Case File

CVE-2026-87812

MEDIUM · CVSS 6.8 EPSS 0.20% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-09 · Last synced 2026-09-15

CyberRota Analysis

AI-Generated

The vulnerability affects the SiYuan application, specifically in the Bazaar package cards, where the iconURL metadata is improperly handled, allowing for stored cross-site scripting (XSS) attacks. This flaw enables attackers to inject malicious URLs that execute JavaScript, potentially leading to unauthorized API requests and manipulation of the application state when users interact with Bazaar listings. Organizations using SiYuan versions prior to 3.8.2 should prioritize patching this vulnerability to mitigate the risk of exploitation.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-87812
Severity
MEDIUM
CVSS
6.8
EPSS
0.20%
Java

Original NVD 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.