SiYuan 3.8.3 MCP File Operations Path Traversal

SiYuan versions 3.8.0 through 3.8.3 contain an incorrect authorization issue in recursive MCP file operations. An authenticated administrator can bypass the sensitive-path guard to read protected descendants or overwrite them through archive extraction...

CVE-2026-100633

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...

EUVD-2026-87727

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-2026-93709 Dancer2 versions before 2.2.0 for Perl serve a layout as a page when an equivalent spelling of its path misses the guard in the AutoPage handler

Dancer2 versions before 2.2.0 for Perl serve a layout as a page when an equivalent spelling of its path misses the guard in the AutoPage handler. The handler compares the request path against the layout directory name as text, while the lookup that follows canonicalises it. A doubled slash, a dot...

CVE-2026-85580

SiYuan versions before v3.8.2 contain a path guard bypass vulnerability in the MCP file-access handler that uses case-sensitive matching on Linux filesystems. Attackers can read the protected publishAccess.json file by requesting case-variant paths like PublishAccess.json to disclose sensitive...

CVE-2026-85580 SiYuan before v3.8.2 Path Guard Bypass via Case Mismatch

SiYuan versions before v3.8.2 contain a path guard bypass vulnerability in the MCP file-access handler that uses case-sensitive matching on Linux filesystems. Attackers can read the protected publishAccess.json file by requesting case-variant paths like PublishAccess.json to disclose sensitive...

CVE-2026-85580 SiYuan before v3.8.2 Path Guard Bypass via Case Mismatch

SiYuan versions before v3.8.2 contain a path guard bypass vulnerability in the MCP file-access handler that uses case-sensitive matching on Linux filesystems. Attackers can read the protected publishAccess.json file by requesting case-variant paths like PublishAccess.json to disclose sensitive...

EUVD-2026-71003

SiYuan versions before v3.8.2 contain a path guard bypass vulnerability in the MCP file-access handler that uses case-sensitive matching on Linux filesystems. Attackers can read the protected publishAccess.json file by requesting case-variant paths like PublishAccess.json to disclose sensitive...

CVE-2026-85580 SiYuan before v3.8.2 Path Guard Bypass via Case Mismatch

SiYuan versions before v3.8.2 contain a path guard bypass vulnerability in the MCP file-access handler that uses case-sensitive matching on Linux filesystems. Attackers can read the protected publishAccess.json file by requesting case-variant paths like PublishAccess.json to disclose sensitive...

CVE-2026-85580

SiYuan versions before v3.8.2 contain a path guard bypass in the MCP file-access handler , caused by case-sensitive matching on Linux filesystems. An attacker with low privileges can read the protected publishAccess.json file by requesting a case-variant path (e.g., PublishAccess.json), disclosin...

PT-2026-85480

SiYuan versions before v3.8.2 contain a path guard bypass vulnerability in the MCP file-access handler that uses case-sensitive matching on Linux filesystems. Attackers can read the protected publishAccess.json file by requesting case-variant paths like PublishAccess.json to disclose sensitive...

CVE-2026-85580: Improper Limitation of a Pathname to a Restricted Directory

SiYuan versions before v3.8.2 contain a path guard bypass vulnerability in the MCP file-access handler that uses case-sensitive matching on Linux filesystems. Attackers can read the protected publishAccess.json file by requesting case-variant paths like PublishAccess.json to disclose sensitive...

CVE-2026-85175 SiYuan before v3.8.2 TLS Private Key Disclosure via getFile

SiYuan versions = 3.8.1 fixed in v3.8.2 contain an incomplete blocklist in the IsForbiddenAbsPath function kernel/util/pathguard.go, which only blocks conf/conf.json by exact match and does not restrict the TLS private key conf/key.pem or CA private key conf/ca.key stored in the same conf/...

EUVD-2026-70410

SiYuan versions = 3.8.1 fixed in v3.8.2 contain an incomplete blocklist in the IsForbiddenAbsPath function kernel/util/pathguard.go, which only blocks conf/conf.json by exact match and does not restrict the TLS private key conf/key.pem or CA private key conf/ca.key stored in the same conf/...

CVE-2026-85175

SiYuan versions ≤ 3.8.1 contain an incomplete blocklist in the IsForbiddenAbsPath() function (kernel/util/path_guard.go) that only blocks conf/conf.json by exact match but fails to restrict the TLS private key (conf/key.pem) and CA private key (conf/ca.key). Because the getFile handler skips the ...

CVE-2026-85175 SiYuan before v3.8.2 TLS Private Key Disclosure via getFile

SiYuan versions = 3.8.1 fixed in v3.8.2 contain an incomplete blocklist in the IsForbiddenAbsPath function kernel/util/pathguard.go, which only blocks conf/conf.json by exact match and does not restrict the TLS private key conf/key.pem or CA private key conf/ca.key stored in the same conf/...

CVE-2026-82651

SiYuan before v3.8.1 does not apply the IsForbiddenAbsPath guard introduced in GHSA-c8r8-95hg-mp34 to the /history/path and /repo/diff/path endpoints in kernel/server/serve.go. These routes require admin authentication but construct file paths independently, so an authenticated administrator can...

CVE-2026-82651 SiYuan before v3.8.1 Missing Authorization via /history and /repo/diff

SiYuan before v3.8.1 does not apply the IsForbiddenAbsPath guard introduced in GHSA-c8r8-95hg-mp34 to the /history/path and /repo/diff/path endpoints in kernel/server/serve.go. These routes require admin authentication but construct file paths independently, so an authenticated administrator can...

PT-2026-83577

Name of the Vulnerable Software and Affected Versions SiYuan versions prior to 3.8.1 Description An issue exists in kernel/server/serve.go where the IsForbiddenAbsPath guard is not applied to the '/history/path' and '/repo/diff/path' endpoints. Although these endpoints require administrator...