SiYuan: TLS Private Keys Readable via getFile (Incomplete Blocklist)

Summary: IsForbiddenAbsPath only blocks conf/conf.json by exact match. The TLS private key conf/key.pem and CA private key conf/ca.key live in the same conf/ directory and are absent from the blocklist. Any authenticated user can retrieve them via POST /api/file/getFile. Root cause...

CVE-2026-100646 SiYuan before v3.8.4 Authentication Bypass via Missing Origin Header

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...

CVE-2026-100646

The SiYuan personal knowledge management system (versions up to and including 3.8.3 ) is vulnerable to an authentication bypass because the kernel's authentication guards—specifically CheckAuth in kernel/model/session.go and IsSessionOriginAllowed in kernel/util/net.go—fail open when the HTTP Ori...

CVE-2026-100646 SiYuan before v3.8.4 Authentication Bypass via Missing Origin Header

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...

CVE-2026-100646 SiYuan before v3.8.4 Authentication Bypass via Missing Origin Header

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...

CVE-2026-100646: Origin Validation Error

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...

PT-2026-99317

Name of the Vulnerable Software and Affected Versions SiYuan versions prior to 3.8.4 Description Authentication guards CheckAuth in kernel/model/session.go and IsSessionOriginAllowed in kernel/util/net.go fail open when the HTTP Origin header is absent. This occurs because the system incorrectly...

SUSE CVE-2026-72809

SiYuan versions = v3.7.2 patched in v3.7.4 contain an authentication bypass vulnerability in the kernel's CheckAuth function, which grants the administrator role RoleAdministrator to any request whose RemoteAddr is loopback 127.0.0.1 for a specific set of endpoints including /api/system/exit,...

EUVD-2026-57410

SiYuan: Localhost-trust admin bypass on auth-code-gated endpoints, with potential remote reachability via the fixed-port proxy...

CVE-2026-73056 SiYuan kernel before 3.7.4 Unthrottled Brute-Force via API Token

SiYuan kernel versions before 3.7.4 contain an improper restriction of excessive authentication attempts vulnerability in the CheckAuth middleware. The middleware accepts the API token Conf.Api.Token via an Authorization header Token/Bearer or a ?token= query parameter, and neither path is...

CVE-2026-73056 SiYuan kernel before 3.7.4 Unthrottled Brute-Force via API Token

SiYuan kernel versions before 3.7.4 contain an improper restriction of excessive authentication attempts vulnerability in the CheckAuth middleware. The middleware accepts the API token Conf.Api.Token via an Authorization header Token/Bearer or a ?token= query parameter, and neither path is...

EUVD-2026-59798

SiYuan before v3.7.4 improperly restricts excessive authentication attempts in the CheckAuth middleware. The HTTP Basic Authentication branch, which guards nearly the entire /api/ surface, accepts the workspace access code Conf.AccessAuthCode as the Basic Auth password but never consults the...

CVE-2026-73056: Improper Restriction of Excessive Authentication Attempts

SiYuan kernel versions before 3.7.4 contain an improper restriction of excessive authentication attempts vulnerability in the CheckAuth middleware. The middleware accepts the API token Conf.Api.Token via an Authorization header Token/Bearer or a ?token= query parameter, and neither path is...

CVE-2026-73046

SiYuan before v3.7.4 improperly restricts excessive authentication attempts in the CheckAuth middleware. The HTTP Basic Authentication branch, which guards nearly the entire /api/ surface, accepts the workspace access code Conf.AccessAuthCode as the Basic Auth password but never consults the...

CVE-2026-73046

SiYuan before v3.7.4 improperly restricts excessive authentication attempts in the CheckAuth middleware. The HTTP Basic Authentication branch, which guards nearly the entire /api/ surface, accepts the workspace access code Conf.AccessAuthCode as the Basic Auth password but never consults the...

PT-2026-73053

Name of the Vulnerable Software and Affected Versions SiYuan versions prior to 3.7.4 Description Improper restriction of authentication attempts occurs in the CheckAuth middleware. The HTTP Basic Authentication branch, which protects most of the /api/ endpoints, accepts the workspace access code...

CVE-2026-73046: Improper Restriction of Excessive Authentication Attempts

SiYuan before v3.7.4 improperly restricts excessive authentication attempts in the CheckAuth middleware. The HTTP Basic Authentication branch, which guards nearly the entire /api/ surface, accepts the workspace access code Conf.AccessAuthCode as the Basic Auth password but never consults the...

CVE-2026-72809 SiYuan before v3.7.4 Authentication Bypass via Localhost Trust

SiYuan versions = v3.7.2 patched in v3.7.4 contain an authentication bypass vulnerability in the kernel's CheckAuth function, which grants the administrator role RoleAdministrator to any request whose RemoteAddr is loopback 127.0.0.1 for a specific set of endpoints including /api/system/exit,...

CVE-2026-72809

Summary: SiYuan before v3.7.4 contains an authentication bypass in the kernel’s CheckAuth function that grants the administrator role to any request from the loopback address for a specific set of endpoints (e.g., /api/system/exit, getNetwork, getWorkspaceInfo, /assets/, /export/ ). The bypass oc...

PT-2026-71251

Name of the Vulnerable Software and Affected Versions SiYuan versions prior to 3.7.4 Description An authentication bypass exists in the kernel's CheckAuth function. The system grants the RoleAdministrator role to any request where the RemoteAddr is the loopback address 127.0.0.1 for specific...