What’s Vulnerable › Vulnerabilities

CVE-2026-68587: SiYuan before v3.7.3 Information Disclosure via getHeading*Transaction

• Severity: high (CVSS 8.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-03 · updated 2026-10-23
• Weakness: CWE-862

Description

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.

Affected products

• siyuan-note siyuan: before 3.7.3 — fixed in 3.7.3

How to fix

Upgrade to a fixed version: siyuan-note siyuan 3.7.3. Check the vendor advisory for mitigations.

References

• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-69mh-gvh4-8gp7
• https://www.vulncheck.com/advisories/siyuan-before-information-disclosure-via-getheading-transaction
• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-69mh-gvh4-8gp7

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