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Mon, 28 Sep 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Sat, 26 Sep 2026 13:30:00 +0000
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| Description | SiYuan v3.8.3 fails to HTML-escape the data-subtype attribute when generating gutter-button markup (app/src/protyle/gutter/button.ts, assigned via innerHTML in app/src/protyle/gutter/index.ts) from content pasted as plain-text Markdown containing a Kramdown inline attribute list (IAL). Because the shared Lute renderer parses Kramdown IAL from text/plain input, an attacker-supplied Markdown snippet using entity-encoded quotes in data-subtype breaks out of the attribute value when the gutter markup is re-parsed by the browser, injecting additional attributes such as autofocus and onfocus. If a victim pastes the crafted Markdown and the affected gutter control receives focus, the injected handler executes; in the Electron desktop application, where the main BrowserWindow enables Node integration and disables context isolation, this results in JavaScript execution with renderer Node.js privileges (remote code execution). Fixed in v3.8.4. | |
| Title | SiYuan before v3.8.4 Cross-Site Scripting via Kramdown IAL | |
| First Time appeared |
B3log
B3log siyuan |
|
| Weaknesses | CWE-79 | |
| CPEs | cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:* | |
| Vendors & Products |
B3log
B3log siyuan |
|
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-09-28T18:51:14.199Z
Reserved: 2026-09-26T02:32:35.659Z
Link: CVE-2026-100639
Updated: 2026-09-28T18:50:48.243Z
Status : Deferred
Published: 2026-09-26T14:16:45.633
Modified: 2026-09-28T19:16:44.720
Link: CVE-2026-100639
No data.
OpenCVE Enrichment
Updated: 2026-09-26T19:45:08Z