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CVE-2026-40922

MEDIUM

5.4

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.

Details CVE

Score CVSS v3.15.4

SeveriteMEDIUM

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisLOW

Interaction utilisateurREQUIRED

Publie4/17/2026

Derniere modification4/20/2026

Sourcenvd

Observations honeypot0

Produits affectes

b3log:siyuan

Faiblesses (CWE)

CWE-79

References

https://github.com/advisories/GHSA-4663-4mpg-879v(security-advisories@github.com)

https://github.com/siyuan-note/siyuan/commit/b382f50e1880ed996364509de5a10a72d7409428(security-advisories@github.com)

https://github.com/siyuan-note/siyuan/releases/tag/v3.6.4(security-advisories@github.com)

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-8q5w-mmxf-48jg(security-advisories@github.com)

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-8q5w-mmxf-48jg(134c704f-9b21-4f2e-91b3-4a467353bcc0)

Correlations IOC

Aucune correlation enregistree

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