CVE-2026-33066
Description
SiYuan is a personal knowledge management system. In versions 3.6.0 and below, the backend renderREADME function uses lute.New() without calling SetSanitize(true), allowing raw HTML embedded in Markdown to pass through unmodified. The frontend then assigns the rendered HTML to innerHTML without any additional sanitization. A malicious package author can embed arbitrary JavaScript in their README that executes when a user clicks to view the package details. Because SiYuan's Electron configuration enables nodeIntegration: true with contextIsolation: false, this XSS escalates directly to full Remote Code Execution. The issue was patched in version 3.6.1.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/siyuan-note/siyuan/kernelGo | < 0.0.0-20260314111550-b382f50e1880 | 0.0.0-20260314111550-b382f50e1880 |
Affected products
4- ghsa-coords3 versionspkg:golang/github.com/siyuan-note/siyuan/kernelpkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2016.0
< 0.0.0-20260314111550-b382f50e1880+ 2 more
- (no CPE)range: < 0.0.0-20260314111550-b382f50e1880
- (no CPE)range: < 0.0.20260326T203309-150000.1.155.2
- (no CPE)range: < 0.0.20260723T184607-160000.1.1
- Range: < 3.6.1
Patches
Vulnerability mechanics
References
4- github.com/siyuan-note/siyuan/commit/b382f50e1880ed996364509de5a10a72d7409428nvdPatchWEB
- github.com/siyuan-note/siyuan/security/advisories/GHSA-4663-4mpg-879vnvdExploitMitigationVendor AdvisoryWEB
- github.com/advisories/GHSA-4663-4mpg-879vghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-33066ghsaADVISORY
News mentions
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