CVE-2026-56397Critical· 9.6▾ AbyssalPoC availableSiYuan before v3.6.1 fails to sanitize package metadata and README content in the Bazaar marketplace, allowing malicious package authors to inject arbitrary HTML and JavaScript. Attackers can achieve remote code execution on any user bro…
▾ Abyssal zone — Critical with a public exploit or in-the-wild use
impact 52.8 · likelihood 0.1 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Sep 14.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.7%
Last analysed / modified upstream
Exploit / PoC code exists
— → 9.6
medium → critical
SiYuan before v3.6.1 fails to sanitize package metadata and README content in the Bazaar marketplace, allowing malicious package authors to inject arbitrary HTML and JavaScript. Attackers can achieve remote code execution on any user browsing the Bazaar by embedding XSS payloads in package displayName, description, or README fields, exploiting Electron's nodeIntegration setting to execute OS commands.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
github.com/siyuan-note/siyuan/kernel <= 0.0.0-20260313024916-fd6526133bb3Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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