Vulnerability · Published Mar 31, 2026 · Assigned by GitHub_M
CVE-2026-34453SiYuan: Broken access control in /api/bookmark/getBookmark allows unauthenticated publish visitors to read password-protected bookmarked content
High 7.5
In plain English
A high-severity incorrect authorization in siyuan from siyuan-note. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 69% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei. Fixed versions are available - upgrade the affected package.
Official description
SiYuan is a personal knowledge management system. Prior to version 3.6.2, the publish service exposes bookmarked blocks from password-protected documents to unauthenticated visitors. In publish/read-only mode, /api/bookmark/getBookmark filters bookmark results by calling FilterBlocksByPublishAccess(nil, ...). Because the filter treats a nil context as authorized, it skips the publish password check and returns bookmarked blocks from documents configured as Protected. As a result, anyone who can access the publish service can retrieve content from protected documents without providing the required password, as long as at least one block in the document is bookmarked. This issue has been patched in version 3.6.2.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/siyuan-note/siyuan/kernel | 3.6.2 | GHSA-c77m-r996-jr3q |
| Go | github.com/siyuan-note/siyuan/kernel | no fix listed | GO-2026-5318 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| siyuan-note | siyuan | < 3.6.2 |
Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
References
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-c77m-r996-jr3q x_refsource_CONFIRM
- https://github.com/siyuan-note/siyuan/issues/17246 x_refsource_MISC
- https://github.com/siyuan-note/siyuan/releases/tag/v3.6.2 x_refsource_MISC