CVE-2026-72805: SiYuan before v3.7.4 Information Disclosure via Block Endpoints
SiYuan versions before v3.7.4 fail to enforce publish-access checks on getBlockBreadcrumb, getRefText, and getBlockTreeInfos endpoints, allowing disclosure of protected document content and metadata. Anonymous readers or publish RoleReader accounts can retrieve document titles, ancestor block content snippets, reference text, and path metadata for publish-forbidden or password-protected documents by supplying block IDs.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in v3.7.4
Event History
Frequently Asked Questions
What is the severity of CVE-2026-72805?
The severity of CVE-2026-72805 is medium with a score of 5.8.
How do I fix CVE-2026-72805?
To fix CVE-2026-72805, upgrade to SiYuan version 3.7.4 or later.
What kind of information is disclosed by CVE-2026-72805?
CVE-2026-72805 allows the disclosure of protected document content and metadata via certain endpoints.
Who is affected by CVE-2026-72805?
Users of SiYuan versions before 3.7.4 are affected, particularly those allowing anonymous access or using publish RoleReader accounts.
What endpoints are involved in CVE-2026-72805?
CVE-2026-72805 involves the getBlockBreadcrumb, getRefText, and getBlockTreeInfos endpoints.