CVE-2026-73606 SiYuan before v3.7.4 Information Disclosure via getRefIDs
Unauthenticated attackers can discover block identifiers of password-protected documents in SiYuan, leaking metadata without needing the document password.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-73606?
CVE-2026-73606 is a medium-severity vulnerability in siyuan-note siyuan, published on 13 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
SiYuan versions before v3.7.4 contain an information disclosure vulnerability in the /api/block/getRefIDs endpoint that fails to check password-protected document tiers. Unauthenticated readers can discover that password-protected documents reference specific blocks and obtain block identifiers without entering the document password.
Weakness: CWE-639
Which versions are affected by CVE-2026-73606?
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 | 0.0.0-20260812083335-251596fc0de2 |
github.com/siyuan-note/siyuan/kernel Go | All versions | 0.0.0-20260812083335-251596fc0de2 |
github.com/siyuan-note/siyuan/kernel Go | All versions | 0.0.0-20260812083335-251596fc0de2 |
How do I fix CVE-2026-73606?
Upgrade github.com/siyuan-note/siyuan/kernel to 0.0.0-20260812083335-251596fc0de2 or later.
Is CVE-2026-73606 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-73606 exists.
Sources
Also known as GHSA-vg99-7gj7-2fr5, GO-2026-6635.