Vulnerability · Published Mar 20, 2026 · Assigned by GitHub_M

CVE-2026-33067SiYuan has Stored XSS to RCE via Unsanitized Bazaar Package Metadata

Medium 5.3

In plain English

A medium-severity cross-site scripting in siyuan from siyuan-note. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)5.3Medium

Exploit odds (30 days)0.6%top 52.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack tooling1Public PoC

Official description

SiYuan is a personal knowledge management system. Versions 3.6.0 and below render package metadata fields (displayName, description) using template literals without HTML escaping. A malicious package author can inject arbitrary HTML/JavaScript into these fields, which executes automatically when any user browses the Bazaar page. Because SiYuan's Electron configuration enables nodeIntegration: true with contextIsolation: false, this XSS escalates directly to full Remote Code Execution on the victim's operating system — with zero user interaction beyond opening the marketplace tab. This issue has been fixed in version 3.6.1.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/siyuan-note/siyuan/kernel	0.0.0-20260317012524-fe4523fff2c8	GHSA-mvpm-v6q4-m2pf
Go	github.com/siyuan-note/siyuan/kernel	0.0.0-20260317012524-fe4523fff2c8	GO-2026-4747

Affected products (as reported)

Vendor	Product	Versions
siyuan-note	siyuan	< 3.6.1

Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

References

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-mvpm-v6q4-m2pf x_refsource_CONFIRM