CVE-2026-72803

SiYuan before v3.7.4 Information Disclosure via getBlockAttrs

SiYuan versions before v3.7.4 fail to enforce publish-access checks in the getBlockAttrs and batchGetBlockAttrs endpoints. Attackers can retrieve block attributes including names, aliases, memos, and custom fields from protected documents by sending POST requests with block IDs.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

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B3log Siyuan

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Siyuan Siyuan

CVE-2026-72802

SiYuan before v3.7.4 Information Disclosure via resolveAssetPath

SiYuan versions before v3.7.4 contain an information disclosure vulnerability in the resolveAssetPath endpoint that returns absolute filesystem paths unmodified to CheckAuth-only requests. Attackers can harvest relative asset paths from published documents and submit them to resolveAssetPath to obtain the server's absolute workspace path, disclosing the operating-system username and installation layout.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

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B3log Siyuan

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Siyuan Siyuan

CVE-2026-72800

SiYuan before v3.7.4 Information Disclosure via Unfiltered API

SiYuan versions before v3.7.4 fail to apply publish-access filtering to the getAttributeViewKeysByID endpoint, allowing authenticated readers to retrieve complete database column schemas including descriptions, select vocabularies, and template expressions. Additionally, getBlockDefIDsByRefText and getBlockRelevantIDs endpoints enumerate workspace-wide block IDs without publish scoping, enabling attackers to discover valid block identifiers across publish boundaries and access content from hidden or password-protected documents.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

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B3log Siyuan

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Siyuan Siyuan

CVE-2026-72796

SiYuan before v3.7.4 Access Control Bypass via Static Routes

SiYuan before v3.7.4 contains an access control bypass vulnerability where static-file routes in the server mux bypass publish-access controls enforced on the REST API. Attackers with publish reader tokens or anonymous access in disabled-auth mode can read templates, snippets, and export artifacts by directly accessing static routes that lack the same restrictions as their REST API counterparts.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

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B3log Siyuan

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Siyuan Siyuan

CVE-2026-72795

SiYuan before v3.7.4 Information Disclosure via Embed Block

SiYuan versions before v3.7.4 fail to filter embedded block content by publish access in the getBlockDOMWithEmbed and getBlockDOMsWithEmbed endpoints. Attackers can request published blocks containing embed queries to read content from password-protected, hidden, or forbidden documents without authorization.

CVSS 4.0 · 9.2 Critical EPSS < 1% KEV · Not listed

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B3log Siyuan

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Siyuan Siyuan

CVE-2026-72794

siyuan before v3.7.4 Session Cookie Key Disclosure via getConf

siyuan versions before v3.7.4 expose the session cookie signing key through the /api/system/getConf endpoint to unauthenticated users in publish mode. Attackers can retrieve the CookieKey value and forge valid session cookies to impersonate users or gain administrative access.

CVSS 4.0 · 9.2 Critical EPSS < 1% KEV · Not listed

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B3log Siyuan

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Siyuan Siyuan

CVE-2026-72792

SiYuan before v3.7.4 Information Disclosure via Tag API

SiYuan before v3.7.4 contains an information disclosure vulnerability in the /api/tag/getTag endpoint that returns tag labels and occurrence counts from password-protected documents to unauthenticated readers. Attackers can enumerate tag vocabulary and internal terminology from password-protected documents by calling the tag endpoint without providing the document's publish password.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

Vendors

B3log Siyuan

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Siyuan Siyuan

CVE-2026-72790

SiYuan before v3.7.4 Information Disclosure via getNotebookInfo

SiYuan before v3.7.4 contains an information disclosure vulnerability in the /api/notebook/getNotebookInfo endpoint that returns notebook metadata without authorization checks. Attackers can read notebook names, document counts, sizes, and timestamps for closed or non-published notebooks that should be hidden from readers.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

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B3log Siyuan

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Siyuan Siyuan

CVE-2026-72788

SiYuan before v3.7.4 Information Disclosure via UILayout Filter

SiYuan versions before v3.7.4 contain an information disclosure vulnerability in the UILayout filter that fails to properly restrict administrator workspace state from publish readers. Unauthenticated attackers can retrieve the administrator's open documents, search terms, notebook paths, and private asset locations by calling the getConf endpoint without authentication.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

Vendors

B3log Siyuan

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Siyuan Siyuan

CVE-2026-69086

SiYuan before v3.7.3 Path Traversal via unvalidated avID

SiYuan versions before v3.7.3 fail to validate the avID parameter on all code branches in attribute-view read endpoints, allowing attackers to construct traversal paths that escape the storage directory. Authenticated users with RoleReader permissions or anonymous clients when publish authentication is disabled can read JSON files outside the attribute-view directory to disclose cross-scope database content.

CVSS 4.0 · 8.3 High EPSS < 1% KEV · Not listed

Vendors

B3log Siyuan

Products

Siyuan Siyuan

CVE-2026-69085

SiYuan before v3.7.3 SQL Injection via searchDocs

SiYuan before v3.7.3 contains a SQL injection vulnerability in the /api/filetree/searchDocs endpoint, where the caller-supplied keyword parameter is concatenated directly into SQL statements with no escaping or parameter binding. The endpoint is reachable by a publish RoleReader token, or unauthenticated when publish mode is enabled with Publish.Auth.Enable set to false. Because the statement executes on a read-write SQLite handle via a driver that supports stacked (semicolon-separated) statements, an attacker can read and modify database content across all cleartext (non-encrypted) notebooks on the instance.

CVSS 4.0 · 9.9 Critical EPSS 1.4% KEV · Not listed

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B3log Siyuan

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Siyuan Siyuan

CVE-2026-69084

SiYuan before v3.7.3 SQL Injection via searchEmbedBlock

SiYuan versions <= v3.7.2 expose the /api/search/searchEmbedBlock endpoint, which passes a client-supplied SQL statement verbatim to the main read-write siyuan.db handle with no single-statement, read-only, or admin restrictions. The endpoint is gated only by CheckAuth, making it reachable by the publish RoleReader token and by anonymous users when publish authentication is disabled. Because the underlying driver executes stacked statements, an attacker can read and modify content across all opened cleartext notebooks (encrypted per-box notebooks are excluded). Fixed in v3.7.3.

CVSS 4.0 · 9.9 Critical EPSS 1.6% KEV · Not listed

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B3log Siyuan

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Siyuan Siyuan

CVE-2026-69083

SiYuan before v3.7.3 SQL Injection via fullTextSearchAssetContent

SiYuan versions before v3.7.3 contain SQL injection vulnerabilities in the fullTextSearchAssetContent endpoint reachable by unauthenticated users and publish RoleReader tokens. Attackers can execute arbitrary SQL on the read-write asset-content database via unescaped method parameters and REGEXP clauses to read, modify, or delete cross-notebook data.

CVSS 4.0 · 9.9 Critical EPSS < 1% KEV · Not listed

Vendors

B3log Siyuan

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Siyuan Siyuan

CVE-2026-68587

SiYuan before v3.7.3 Information Disclosure via getHeading*Transaction

SiYuan versions before v3.7.3 contain an information disclosure vulnerability in the getHeadingDeleteTransaction, getHeadingLevelTransaction, and getHeadingInsertTransaction endpoints that return rendered block DOM without publish-access checks. Anonymous readers or publish RoleReader tokens can supply a heading block ID to read full rendered content of publish-disabled documents that should be restricted.

CVSS 4.0 · 9.2 Critical EPSS < 1% KEV · Not listed

Vendors

B3log Siyuan

Products

Siyuan Siyuan

CVE-2026-68586

SiYuan before v3.7.3 Content Disclosure via getBacklinkDoc

SiYuan before v3.7.3 fails to apply publish-access filters to the getBacklinkDoc and getBackmentionDoc content endpoints (/api/ref/getBacklinkDoc and /api/ref/getBackmentionDoc). While the corresponding backlink list endpoints filter publish-forbidden documents, the content endpoints (gated only by CheckAuth) do not. A publish-mode reader — including an anonymous reader when publish Basic Auth is disabled — can call these endpoints directly with a publish-forbidden document's ID to retrieve its rendered DOM content and to determine whether the document references a given block (a reference-existence oracle).

CVSS 4.0 · 9.2 Critical EPSS < 1% KEV · Not listed

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B3log Siyuan

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Siyuan Siyuan

CVE-2026-68585

SiYuan before v3.7.3 Metadata Disclosure via getBlockInfo

SiYuan versions before v3.7.3 contain a metadata disclosure vulnerability in the /api/block/getBlockInfo endpoint that returns document root metadata including title for publish-forbidden documents without publish-access checks. Anonymous readers or publish RoleReader tokens can supply a block ID to retrieve the title, notebook, path, root ID, and icon of documents administrators marked as excluded from publishing.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

Vendors

B3log Siyuan

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Siyuan Siyuan

CVE-2026-68584

SiYuan before v3.7.3 Authentication Bypass via Content Endpoints

SiYuan versions before v3.7.3 contain an authentication bypass vulnerability in publish mode where content-returning endpoints getHeadingChildrenDOM, getHeading*Transaction, and getBacklinkDoc perform no password check despite protecting the primary getDoc endpoint. Anonymous attackers can retrieve full content of password-protected documents by obtaining internal block IDs from reader-accessible endpoints and calling unprotected content endpoints to bypass the password gate.

CVSS 4.0 · 9.2 Critical EPSS < 1% KEV · Not listed

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B3log Siyuan

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Siyuan Siyuan

CVE-2026-66396

SiYuan before v3.7.2 Stored XSS to RCE via title-img IAL

SiYuan before v3.7.2 fails to escape the title-img Individual Attribute List value when rendering Gallery and Kanban cover images, allowing stored cross-site scripting via unescaped style attribute interpolation. Attackers with editor permissions can inject onload handlers that execute arbitrary code in the Electron renderer with full Node.js access when victims open affected documents.

CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed

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B3log Siyuan

Products

Siyuan Siyuan

CVE-2026-66395

SiYuan Desktop before v3.7.2 Reflected XSS to RCE via siyuan Protocol

SiYuan desktop before v3.7.2 contains a reflected cross-site scripting vulnerability in the bazaar plugin readme handler that allows attackers to execute arbitrary code by crafting a malicious siyuan:// deep link. Attackers can inject HTML payloads via the plugin name parameter that execute with full Node.js access through insertAdjacentHTML rendering in an insecurely configured Electron renderer.

CVSS 4.0 · 9.4 Critical EPSS < 1% KEV · Not listed

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B3log Siyuan

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Siyuan Siyuan

CVE-2026-66394

SiYuan before v3.7.3 Stored and Reflected XSS via SVG Sanitizer Bypass

SiYuan before v3.7.3 contains stored and reflected cross-site scripting vulnerabilities in SVG sanitization that allows authenticated attackers to execute scripts by bypassing the HTML parser-based cleaner. Attackers can hide script tags within desc, style, or noscript elements which the HTML parser treats as raw text but browsers interpret as executable SVG content when served as image/svg+xml, enabling script execution in the application origin.

CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed

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B3log Siyuan

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Siyuan Siyuan