CVE-2026-100640

SiYuan versions before v3.8.4 are vulnerable to an authorization omission in the siyuan-get IPC handler. This flaw allows remote-kernel renderers to access native clipboard formats by invoking specific commands, including clipboardReadMathML, clipboardReadOffice, and clipboardReadWPS, using match...

CVE-2026-100641 SiYuan before v3.8.4 Stored XSS via Unescaped Flashcard Content

SiYuan before v3.8.4 does not HTML-escape stored flashcard block content before interpolating it into the card-manager list markup. Block content returned by /api/riff/getRiffCards is inserted into a card item template in app/src/card/viewCards.ts and assigned to listElement.innerHTML, so content...

CVE-2026-100641 SiYuan before v3.8.4 Stored XSS via Unescaped Flashcard Content

SiYuan before v3.8.4 does not HTML-escape stored flashcard block content before interpolating it into the card-manager list markup. Block content returned by /api/riff/getRiffCards is inserted into a card item template in app/src/card/viewCards.ts and assigned to listElement.innerHTML, so content...

CVE-2026-100640 SiYuan before v3.8.4 Clipboard Data Disclosure via IPC

SiYuan before v3.8.4 contains an authorization omission in the siyuan-get IPC handler that allows remote-kernel renderers to access native clipboard formats by invoking clipboardReadMathML, clipboardReadOffice, and clipboardReadWPS commands with matching plaintext. Attackers controlling remote...

CVE-2026-100640 SiYuan before v3.8.4 Clipboard Data Disclosure via IPC

SiYuan before v3.8.4 contains an authorization omission in the siyuan-get IPC handler that allows remote-kernel renderers to access native clipboard formats by invoking clipboardReadMathML, clipboardReadOffice, and clipboardReadWPS commands with matching plaintext. Attackers controlling remote...

EUVD-2026-87733

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...

CVE-2026-100639 SiYuan before v3.8.4 Cross-Site Scripting via Kramdown IAL

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...

CVE-2026-100639

SiYuan v3.8.3 is vulnerable to a Cross-Site Scripting (XSS) flaw due to a failure to HTML-escape the data-subtype attribute during gutter-button markup generation. This occurs when content containing a Kramdown inline attribute list (IAL) is pasted as plain-text Markdown. The shared Lute renderer...

CVE-2026-100639 SiYuan before v3.8.4 Cross-Site Scripting via Kramdown IAL

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...

CVE-2026-100639 SiYuan before v3.8.4 Cross-Site Scripting via Kramdown IAL

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...

CVE-2026-100637 SiYuan before v3.8.4 Path Traversal via checkoutRepo sessionID

SiYuan versions before v3.8.4 contain a path traversal vulnerability in the checkoutRepo endpoint that allows authenticated administrators to write JSON files outside the workspace. Attackers can supply a sessionID parameter containing directory traversal sequences to overwrite arbitrary JSON fil...

CVE-2026-100638

SiYuan versions before v3.8.4 are vulnerable to a path traversal flaw in the setNotebookIcon endpoint. Authenticated administrators can exploit this by supplying directory traversal sequences in the notebook parameter to escape the workspace data directory. This allows for the creation of arbitra...

CVE-2026-100638 SiYuan before v3.8.4 Path Traversal via setNotebookIcon

SiYuan versions before v3.8.4 contain a path traversal vulnerability in the setNotebookIcon endpoint that allows authenticated administrators to create arbitrary directory trees and write files outside the workspace boundary. Attackers can supply directory traversal sequences in the notebook...

EUVD-2026-87732

SiYuan versions before v3.8.4 contain a path traversal vulnerability in the setNotebookIcon endpoint that allows authenticated administrators to create arbitrary directory trees and write files outside the workspace boundary. Attackers can supply directory traversal sequences in the notebook...

CVE-2026-100637 SiYuan before v3.8.4 Path Traversal via checkoutRepo sessionID

SiYuan versions before v3.8.4 contain a path traversal vulnerability in the checkoutRepo endpoint that allows authenticated administrators to write JSON files outside the workspace. Attackers can supply a sessionID parameter containing directory traversal sequences to overwrite arbitrary JSON fil...

EUVD-2026-87731

SiYuan versions before v3.8.4 contain a path traversal vulnerability in the checkoutRepo endpoint that allows authenticated administrators to write JSON files outside the workspace. Attackers can supply a sessionID parameter containing directory traversal sequences to overwrite arbitrary JSON fil...

CVE-2026-100637

SiYuan versions before v3.8.4 are vulnerable to a path traversal vulnerability within the checkoutRepo endpoint. This flaw allows authenticated administrators to write JSON files outside the designated workspace by supplying a sessionID parameter containing directory traversal sequences. Successf...

CVE-2026-100638 SiYuan before v3.8.4 Path Traversal via setNotebookIcon

SiYuan versions before v3.8.4 contain a path traversal vulnerability in the setNotebookIcon endpoint that allows authenticated administrators to create arbitrary directory trees and write files outside the workspace boundary. Attackers can supply directory traversal sequences in the notebook...

CVE-2026-100636 SiYuan before v3.8.4 Path Traversal via exportBrowserHTML folder

SiYuan versions before v3.8.4 contain a path traversal vulnerability in the exportBrowserHTML endpoint that allows authenticated administrators to write arbitrary HTML content to index.html outside the workspace directory. Attackers can supply a folder parameter with directory traversal sequences...

EUVD-2026-87730

SiYuan versions before v3.8.4 contain a path traversal vulnerability in the exportBrowserHTML endpoint that allows authenticated administrators to write arbitrary HTML content to index.html outside the workspace directory. Attackers can supply a folder parameter with directory traversal sequences...