CVE-2026-68587 SiYuan before v3.7.3 Information Disclosure via getHeading*Transaction
Attackers can read restricted content from publish-disabled documents by exploiting missing access checks in heading transaction endpoints.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-68587?
CVE-2026-68587 is a critical missing authorization vulnerability in siyuan-note siyuan, published on 3 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-862
Which versions are affected by CVE-2026-68587?
3 open source packages ship an affected version, including github.com/siyuan-note/siyuan/kernel.
| Package | Affected | Fixed in |
|---|---|---|
github.com/siyuan-note/siyuan/kernel Go | All versions | 0.0.0-20260721013353-69db783b782a |
github.com/siyuan-note/siyuan/kernel Go | All versions | 0.0.0-20260721013353-69db783b782a |
github.com/siyuan-note/siyuan/kernel Go | All versions | 0.0.0-20260721013353-69db783b782a |
How do I fix CVE-2026-68587?
Upgrade github.com/siyuan-note/siyuan/kernel to 0.0.0-20260721013353-69db783b782a or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-68587 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-68587 exists.
Sources
Also known as GHSA-69mh-gvh4-8gp7, GO-2026-6381.