Vulnerability · Published Aug 12, 2026 · Assigned by VulnCheck
CVE-2026-72803SiYuan before v3.7.4 Information Disclosure via getBlockAttrs
Medium 5.8
In plain English
A medium-severity missing 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 0.3% (higher than 22% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.8Medium
Exploit odds (30 days)0.3%top 77.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/siyuan-note/siyuan/kernel | 0.0.0-20260724093256-229fdffd7e4a | GHSA-qvq9-hq6p-v378 |
| Go | github.com/siyuan-note/siyuan/kernel | 0.0.0-20260724093256-229fdffd7e4a | GO-2026-6404 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| siyuan-note | siyuan | 0 – before 3.7.4 |
Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
References
- GitHub Security Advisory (GHSA-qvq9-hq6p-v378) vendor-advisory
- VulnCheck Advisory: SiYuan before v3.7.4 Information Disclosure via getBlockAttrs third-party-advisory