Report: CVE-2026-40922 - SiYuan: Incomplete sanitization of bazaar README allows stored XSS via iframe sr

Report: CVE-2026-40922 - SiYuan: Incomplete sanitization of bazaar README allows stored XSS via iframe sr

CVE ID :CVE-2026-40922 Published : April 16, 2026, 11:14 p.m. | 1 hour, 54 minutes ago 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. Severity: 0.0 | NA Visit the link for more details, such as CVSS details, affected products, timeline, and more...

CVE Details

Published
April 16, 2026
Impact: XSS