Answer in brief
CVE-2026-56397 records a Critical severity (CVSS 9.4) vulnerability in SiYuan - Remote Code Execution via Malicious Bazaar Package Metadata and README. The current sources do not mark it as known exploited. The current feed maps SiYuan/SiYuan (generic), github.com/siyuan-note/siyuan/kernel (go), github.com/siyuan-note/siyuan/kernel (go), github.com/siyuan-note/siyuan/kernel (go) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps SiYuan/SiYuan (generic), github.com/siyuan-note/siyuan/kernel (go), github.com/siyuan-note/siyuan/kernel (go), github.com/siyuan-note/siyuan/kernel (go) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| SiYuan/SiYuangeneric | >=0 <3.6.1 | 3.6.1 |
| github.com/siyuan-note/siyuan/kernelgo | >=0 <0.0.0-20260317012524-fe4523fff2c8 | 0.0.0-20260317012524-fe4523fff2c8 |
| github.com/siyuan-note/siyuan/kernelgo | <=0.0.0-20260313024916-fd6526133bb3 | Not reported |
| github.com/siyuan-note/siyuan/kernelgo | >=0 | Not reported |
| siyuango | >=0 | Not reported |
Published upstream
Jun 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 21, 2026
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.
Quoted source text, attributed separately from HOL analysis.