PT-2026-67404 · Siyuan Note · Siyuan

Shirshakhtml · CVE-2026-68587 · Published 2026-08-03 · Updated 2026-08-03

Mitre

CVSS v3.1

8.6

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

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.

Fix

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

CVE-2026-68587

Affected Products

Siyuan

References · 3

• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-69mh-gvh4-8gp7 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-68587 · Security Note
• https://vulncheck.com/advisories/siyuan-before-information-disclosure-via-getheading-transaction · Note