SEPTEMBER 15, 2026
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Case File

CVE-2026-87813

HIGH · CVSS 7.3 EPSS 0.26% Public Exploit

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

CyberRota Analysis

AI-Generated

A stored cross-site scripting vulnerability exists in SiYuan prior to version 3.8.2, affecting the Java platform, where asset filenames are improperly interpolated into HTML without escaping. This flaw allows authenticated attackers to inject malicious JavaScript into the search results, potentially leading to unauthorized API requests and manipulation of application state in the victim's browser. Organizations using SiYuan should prioritize patching 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-2026-87813
Severity
HIGH
CVSS
7.3
EPSS
0.26%
Java

Original NVD Description

SiYuan before v3.8.2 contains a stored cross-site scripting vulnerability in the Search Assets result list where asset filenames are interpolated into HTML without escaping. Authenticated attackers can craft asset filenames containing malicious markup that executes JavaScript in the victim's browser when searching assets, enabling same-origin API requests and application state manipulation.