CVE-2026-68587

critical · 9.2

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.

9.2

CVSS

0.2%

EPSS (exploit prob.)

16th

EPSS percentile

2026-08-03

Published

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weaknesses

CWE-862

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-68587