CVE-2026-103763 SiYuan before v3.8.5 Information Disclosure via /api/notebook/getNotebookInfo
Attackers can access metadata of hidden documents in published notebooks via the getNotebookInfo API endpoint.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-103763?
CVE-2026-103763 is a medium-severity vulnerability in siyuan-note siyuan, published on 2 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
SiYuan before v3.8.5 contains an information disclosure vulnerability that allows read-only publish readers to learn metadata of publish-excluded documents through the getNotebookInfo endpoint. Attackers, including anonymous visitors when no reader password is set, can query publish-visible notebooks to obtain document count, size and modification timestamps of hidden documents.
Weakness: CWE-200
Which versions are affected by CVE-2026-103763?
How do I fix CVE-2026-103763?
No fix has been published for CVE-2026-103763 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-103763 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-103763 exists.
Sources
Also known as GHSA-ccxp-q3vg-jvgj, GHSA-cj7w-46vh-93h9.