CVE-2026-40922
Description
SiYuan is an open-source personal knowledge management system. In versions 3.6.1 through 3.6.3, a prior fix for XSS in bazaar README rendering (incomplete fix for CVE-2026-33066) enabled the Lute HTML sanitizer, but the sanitizer does not block iframe tags, and its URL-prefix blocklist does not effectively filter srcdoc attributes which contain raw HTML rather than URLs. A malicious bazaar package author can include an iframe with a srcdoc attribute containing embedded scripts in their README. When other users view the package in SiYuan's marketplace UI, the payload executes in the Electron context with full application privileges, enabling arbitrary code execution on the user's machine. This issue has been fixed in version 3.6.4.
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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 | < 0.0.0-20260414013942-62eed37a3263 | 0.0.0-20260414013942-62eed37a3263 |
Affected products
2- Range: < 0.0.0-20260414013942-62eed37a3263
- ghsa-coordsRange: < 0.0.0-20260414013942-62eed37a3263
Patches
Vulnerability mechanics
References
7- github.com/siyuan-note/siyuan/commit/b382f50e1880ed996364509de5a10a72d7409428nvdPatchWEB
- github.com/siyuan-note/siyuan/security/advisories/GHSA-8q5w-mmxf-48jgnvdExploitThird Party AdvisoryWEB
- github.com/advisories/GHSA-4663-4mpg-879vnvdThird Party AdvisoryADVISORY
- github.com/advisories/GHSA-8q5w-mmxf-48jgghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-33066ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-40922ghsaADVISORY
- github.com/siyuan-note/siyuan/releases/tag/v3.6.4nvdRelease NotesWEB
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