SiYuan is a personal knowledge management system. Prior to version 3.6.2, a vulnerability allows crafted block attribute values to bypass server-side attribute escaping when an HTML entity is mixed with raw special characters. An attacker can embed a malicious IAL value inside a .sy document, package it as a .sy.zip, and have the victim import it through the normal Import -> SiYuan .sy.zip workflow. Once the note is opened, the malicious attribute breaks out of its original HTML context and injects an event handler, resulting in stored XSS. In the Electron desktop client, this XSS reaches remote code execution because injected JavaScript runs with access to Node/Electron APIs. This issue has been patched in version 3.6.2.
Metrics
Affected Vendors & Products
References
History
Fri, 03 Apr 2026 17:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
B3log
B3log siyuan |
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| CPEs | cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:* | |
| Vendors & Products |
B3log
B3log siyuan |
Fri, 03 Apr 2026 10:15:00 +0000
| Type | Values Removed | Values Added |
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| First Time appeared |
Siyuan
Siyuan siyuan |
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| Vendors & Products |
Siyuan
Siyuan siyuan |
Wed, 01 Apr 2026 23:45:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Wed, 01 Apr 2026 02:15:00 +0000
| Type | Values Removed | Values Added |
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| Description | SiYuan is a personal knowledge management system. Prior to version 3.6.2, a vulnerability allows crafted block attribute values to bypass server-side attribute escaping when an HTML entity is mixed with raw special characters. An attacker can embed a malicious IAL value inside a .sy document, package it as a .sy.zip, and have the victim import it through the normal Import -> SiYuan .sy.zip workflow. Once the note is opened, the malicious attribute breaks out of its original HTML context and injects an event handler, resulting in stored XSS. In the Electron desktop client, this XSS reaches remote code execution because injected JavaScript runs with access to Node/Electron APIs. This issue has been patched in version 3.6.2. | |
| Title | SiYuan: Stored XSS in imported .sy.zip content leads to arbitrary command execution | |
| Weaknesses | CWE-79 CWE-94 |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-03-31T21:47:01.843Z
Updated: 2026-04-01T13:34:23.291Z
Reserved: 2026-03-30T16:56:30.999Z
Link: CVE-2026-34585
Updated: 2026-04-01T13:34:11.964Z
Status : Analyzed
Published: 2026-03-31T22:16:22.080
Modified: 2026-04-03T16:52:22.293
Link: CVE-2026-34585
No data.