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...

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-2026-100638 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-2026-100638 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-2026-100637 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 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-2026-100637

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-2026-100636

SiYuan versions before v3.8.4 are vulnerable to a path traversal vulnerability in the exportBrowserHTML endpoint. This flaw allows authenticated administrators to supply a folder parameter containing directory traversal sequences to escape the export directory. By doing so, an attacker can write ...

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...

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...

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...

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...

CVE-2026-100635 SiYuan before v3.8.4 Authentication Bypass via Plaintext Session Cookie

SiYuan before v3.8.4 contains an authentication bypass vulnerability in the publish service where session cookies are issued without Secure or SameSite attributes over plaintext HTTP connections. An on-path attacker can observe a valid publish-visitor-session-id cookie from a Basic Auth exchange...

CVE-2026-100635 SiYuan before v3.8.4 Authentication Bypass via Plaintext Session Cookie

SiYuan before v3.8.4 contains an authentication bypass vulnerability in the publish service where session cookies are issued without Secure or SameSite attributes over plaintext HTTP connections. An on-path attacker can observe a valid publish-visitor-session-id cookie from a Basic Auth exchange...

CVE-2026-100635 SiYuan before v3.8.4 Authentication Bypass via Plaintext Session Cookie

SiYuan before v3.8.4 contains an authentication bypass vulnerability in the publish service where session cookies are issued without Secure or SameSite attributes over plaintext HTTP connections. An on-path attacker can observe a valid publish-visitor-session-id cookie from a Basic Auth exchange...

CVE-2026-100633 SiYuan 3.8.0 through 3.8.3 Path Traversal via MCP File Operations

SiYuan is a self-hosted personal knowledge management system. In versions 3.8.0 through 3.8.3, the MCP file tool's sensitive-path guard util.IsForbiddenAbsPath, invoked from resolvePath is applied only to the allowed root of recursive operations and not to each resolved descendant path — an...

CVE-2026-100633

The SiYuan personal knowledge management system (versions 3.8.0 through 3.8.3 ) contains a sensitive-path guard bypass in the MCP file tool . The root cause is that the util.IsForbiddenAbsPath() check (invoked via resolvePath()) is only applied to the root of recursive operations rather than each...

CVE-2026-100633 SiYuan 3.8.0 through 3.8.3 Path Traversal via MCP File Operations

SiYuan is a self-hosted personal knowledge management system. In versions 3.8.0 through 3.8.3, the MCP file tool's sensitive-path guard util.IsForbiddenAbsPath, invoked from resolvePath is applied only to the allowed root of recursive operations and not to each resolved descendant path — an...

CVE-2026-100633 SiYuan 3.8.0 through 3.8.3 Path Traversal via MCP File Operations

SiYuan is a self-hosted personal knowledge management system. In versions 3.8.0 through 3.8.3, the MCP file tool's sensitive-path guard util.IsForbiddenAbsPath, invoked from resolvePath is applied only to the allowed root of recursive operations and not to each resolved descendant path — an...