EUVD-2026-60585

SiYuan: 17 block metadata/content endpoints in kernel/api/block.go have zero publish-access filtering, reachable by anonymous publish-mode readers...

EUVD-2026-87740

SiYuan is a self-hosted personal knowledge management system. In versions up to and including 3.8.3, the kernel's authentication guards CheckAuth in kernel/model/session.go and IsSessionOriginAllowed in kernel/util/net.go fail open when the HTTP Origin header is absent, on the incorrect assumptio...

GHSA-69JP-F2P8-9VRG Duplicate Advisory: 17 block metadata/content endpoints in kernel/api/block.go have zero publish-access filtering, reachable by anonymous publish-mode readers

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-4vpg-gwqq-w44c. This link is maintained to preserve external references. Original Description SiYuan before v3.7.4 is missing authorization checks in 17 block metadata/content endpoints in kernel/api/block.go...

CVE-2026-74904 SiYuan before v3.7.4 Missing Authorization via block API

SiYuan before v3.7.4 is missing authorization checks in 17 block metadata/content endpoints in kernel/api/block.go including getRefText, checkBlockExist, and getBlockBreadcrumb. These handlers are gated only by basic authentication model.CheckAuth and lack publish-access filtering, allowing...

CVE-2026-74904

In SiYuan before v3.7.4, 17 block endpoints in kernel/api/block.go (getRefText, checkBlockExist, getBlockBreadcrumb) are gated only by model.CheckAuth without publish-access filtering, letting anonymous publish-mode readers disclose private block content, metadata, and existence info. Patch to v3...

CVE-2026-74904

SiYuan before v3.7.4 is missing authorization checks in 17 block metadata/content endpoints in kernel/api/block.go including getRefText, checkBlockExist, and getBlockBreadcrumb. These handlers are gated only by basic authentication model.CheckAuth and lack publish-access filtering, allowing...

CVE-2026-74904: Missing Authorization

SiYuan before v3.7.4 is missing authorization checks in 17 block metadata/content endpoints in kernel/api/block.go including getRefText, checkBlockExist, and getBlockBreadcrumb. These handlers are gated only by basic authentication model.CheckAuth and lack publish-access filtering, allowing...

PT-2026-76919

Same CWE-862 family, found via an automated bulk sweep of every /api/block/ handler in kernel/api/block.go for the presence of any access-check reference IsReadOnlyRoleContext, checkBlockPublishAccess, GetPublishAccess anywhere in the function body. 17 of 28 candidate endpoints have none...

CVE-2026-74800

SiYuan before v3.7.4 fails to set Content-Disposition and X-Content-Type-Options headers when serving arbitrary file assets, allowing stored cross-site scripting attacks. Authenticated attackers can upload HTML files as assets and execute scripts with full kernel API access when the workspace own...

CVE-2026-74800

SiYuan before v3.7.4 serves uploaded HTML files without Content-Disposition or X-Content-Type-Options headers, enabling authenticated attackers to inject stored XSS that runs with full kernel API access when the workspace owner clicks the asset link; upgrade to v3.7.4 or later. No active exploita...

EUVD-2026-60083

SiYuan before v3.7.4 fails to set Content-Disposition and X-Content-Type-Options headers when serving arbitrary file assets, allowing stored cross-site scripting attacks. Authenticated attackers can upload HTML files as assets and execute scripts with full kernel API access when the workspace own...

CVE-2026-74800 SiYuan before v3.7.4 Stored XSS via assets endpoint

SiYuan before v3.7.4 fails to set Content-Disposition and X-Content-Type-Options headers when serving arbitrary file assets, allowing stored cross-site scripting attacks. Authenticated attackers can upload HTML files as assets and execute scripts with full kernel API access when the workspace own...

CVE-2026-74800

SiYuan before v3.7.4 fails to set Content-Disposition and X-Content-Type-Options headers when serving arbitrary file assets, allowing stored cross-site scripting attacks. Authenticated attackers can upload HTML files as assets and execute scripts with full kernel API access when the workspace own...

PT-2026-76599

SiYuan before v3.7.4 fails to set Content-Disposition and X-Content-Type-Options headers when serving arbitrary file assets, allowing stored cross-site scripting attacks. Authenticated attackers can upload HTML files as assets and execute scripts with full kernel API access when the workspace own...

CVE-2026-74800: Improper Neutralization of Input During Web Page Generation

SiYuan before v3.7.4 fails to set Content-Disposition and X-Content-Type-Options headers when serving arbitrary file assets, allowing stored cross-site scripting attacks. Authenticated attackers can upload HTML files as assets and execute scripts with full kernel API access when the workspace own...

📄 SiYuan 3.7.1 Authentication Bypass / Arbitrary File Write

A proof of concept exploit for a SiYuan version 3.7.1 authentication bypass arbitrary file read and write vulnerability. SiYuan kernel versions 3.7.0 through 3.7.1 contain a missing authorization vulnerability in the Publish reverse proxy where anonymous RoleReader requests are permitted to acces...

Files or Directories Accessible to External Parties

Overview Affected versions of this package are vulnerable to Files or Directories Accessible to External Parties through the importStdMd import process in kernel/api/import.go. An attacker can import data from sensitive or unintended local paths and potentially access or expose local files by...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the forwardProxy function. An attacker can access internal network resources, retrieve sensitive data, and potentially obtain cloud metadata or credentials by supplying a crafted URL to the endpoint...

Improper Handling of Case Sensitivity

Overview Affected versions of this package are vulnerable to Improper Handling of Case Sensitivity via the /api/file/getFile endpoint. An attacker can access sensitive configuration files by submitting mixed-case paths to bypass case-sensitive checks on case-insensitive file systems. Remediation...

Out-of-bounds Read

Overview Affected versions of this package are vulnerable to Out-of-bounds Read via the globalCopyFiles function. An attacker can access sensitive files outside the intended directory by supplying arbitrary file paths to the API endpoint. Remediation Upgrade github.com/siyuan-note/siyuan/kernel/a...