CVE-2026-100646

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-2026-100642

SiYuan versions from v2.1.0 before v3.8.4 contain a cross-site request forgery vulnerability in the CheckAuth lock-screen pass-through branch that grants administrator access to loopback requests without validating Origin headers. Attackers can craft malicious web pages that force victims to...

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...

CVE-2026-100642 SiYuan v2.1.0 before v3.8.4 Cross-Site Request Forgery via CheckAuth

SiYuan versions from v2.1.0 before v3.8.4 contain a cross-site request forgery vulnerability in the CheckAuth lock-screen pass-through branch that grants administrator access to loopback requests without validating Origin headers. Attackers can craft malicious web pages that force victims to...

CVE-2026-100642

SiYuan versions v2.1.0 through v3.8.4 are vulnerable to a Cross-Site Request Forgery (CSRF) flaw in the CheckAuth lock-screen pass-through branch . The root cause is the failure to validate Origin headers , which allows attackers to grant administrator access to loopback requests. By crafting mal...

EUVD-2026-87736

SiYuan versions from v2.1.0 before v3.8.4 contain a cross-site request forgery vulnerability in the CheckAuth lock-screen pass-through branch that grants administrator access to loopback requests without validating Origin headers. Attackers can craft malicious web pages that force victims to...

CVE-2026-100642 SiYuan v2.1.0 before v3.8.4 Cross-Site Request Forgery via CheckAuth

SiYuan versions from v2.1.0 before v3.8.4 contain a cross-site request forgery vulnerability in the CheckAuth lock-screen pass-through branch that grants administrator access to loopback requests without validating Origin headers. Attackers can craft malicious web pages that force victims to...

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...

CVE-2026-100642: Origin Validation Error

SiYuan versions from v2.1.0 before v3.8.4 contain a cross-site request forgery vulnerability in the CheckAuth lock-screen pass-through branch that grants administrator access to loopback requests without validating Origin headers. Attackers can craft malicious web pages that force victims to...

GHSA-57V5-WQX3-CGJ4 SiYuan: Database view structure (all view names, layout types and per-field visibility) is returned to anonymous readers by /api/av/getAttributeViewFieldViews

Scope note please read first This endpoint does not exist in v3.7.3 or on master. It was introduced on the development branch by commit acfc02ee8 "Improve database field visibility across views", 11020 and is live on v3.7.4-alpha.1, so it will ship in v3.7.4 unless gated first. No released stable...

EUVD-2026-57462

SiYuan: Absolute filesystem path and OS username disclosure via resolveAssetPath...

EUVD-2026-57409

SiYuan: Missing publish-access filter on getFileAnnotation discloses private PDF annotations of forbidden/protected documents publish mode...

EUVD-2026-57410

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

GHSA-7HM9-V7VF-7G4W SiYuan: Path Traversal via unvalidated avID in RenderAttributeView/AV read endpoints : reader-reachable cross-scope attribute-view disclosure

CVE: This vulnerability corresponds to CVE-2026-69086. Summary Four attribute-view read endpoints build a filesystem path from a caller-controlled id/avID and read it without confining the result to the attribute-view storage directory DataDir/storage/av/. On the load file-exists code path there ...

EUVD-2026-60584

SiYuan before v3.7.4 contains an insufficient access control vulnerability in the /api/lute/spinBlockDOM endpoint, which is guarded only by CheckAuth middleware instead of CheckAdminRole like its sibling endpoint. Authenticated users with RoleEditor or RoleReader roles can invoke the endpoint to...

CVE-2026-74867

SiYuan versions before 3.7.4 contain a cross-site request forgery vulnerability in the session-cookie authentication branch of CheckAuth that lacks Origin/Referer validation and sets no explicit SameSite attribute on session cookies. Attackers can craft malicious web pages that perform unauthoriz...

CVE-2026-74867 SiYuan before 3.7.4 Cross-Site Request Forgery via CheckAuth

SiYuan versions before 3.7.4 contain a cross-site request forgery vulnerability in the session-cookie authentication branch of CheckAuth that lacks Origin/Referer validation and sets no explicit SameSite attribute on session cookies. Attackers can craft malicious web pages that perform unauthoriz...

EUVD-2026-60086

SiYuan versions before 3.7.4 contain a cross-site request forgery vulnerability in the session-cookie authentication branch of CheckAuth that lacks Origin/Referer validation and sets no explicit SameSite attribute on session cookies. Attackers can craft malicious web pages that perform unauthoriz...

CVE-2026-74867 SiYuan before 3.7.4 Cross-Site Request Forgery via CheckAuth

SiYuan versions before 3.7.4 contain a cross-site request forgery vulnerability in the session-cookie authentication branch of CheckAuth that lacks Origin/Referer validation and sets no explicit SameSite attribute on session cookies. Attackers can craft malicious web pages that perform unauthoriz...

CVE-2026-74867

SiYuan versions before 3.7.4 are affected by a cross-site request forgery (CSRF) vulnerability in the session-cookie authentication branch of CheckAuth() . The root cause is the absence of Origin/Referer header validation combined with the lack of an explicit SameSite attribute on session cookies...