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 anonymous publish-mode readers to disclose private block content-derived text, structural metadata, and existence information for arbitrary block IDs across the workspace.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-4vpg-gwqq-w44c
https://www.vulncheck.com/advisories/siyuan-before-missing-authorization-via-block-api
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-4vpg-gwqq-w44c

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-18 12:19

Updated : 2026-08-26 17:04

NVD link : CVE-2026-74904

Mitre link : CVE-2026-74904

CVE.ORG link : CVE-2026-74904

JSON object : View

Products Affected

No product.

CWE

CWE-862

Missing Authorization

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