SEPTEMBER 18, 2026
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Case File

CVE-2026-82654

HIGH · CVSS 8.9 EPSS 0.22% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-30 · Last synced 2026-09-18

CyberRota Analysis

AI-Generated

SiYuan versions prior to 3.8.1 are vulnerable due to improper escaping of block name, alias, and memo fields, allowing attackers to inject HTML or script tags. This can lead to cross-site scripting (XSS) attacks, potentially compromising user data and session integrity when documents referencing the affected blocks are viewed. 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-2026-82654
Severity
HIGH
CVSS
8.9
EPSS
0.22%

Original NVD Description

SiYuan before v3.8.1 fails to properly escape block name, alias, and memo fields in hint, backlink, and breadcrumb rendering functions. Attackers can set a block's name to contain HTML/script tags that execute when another user views documents referencing or displaying that block.