Vulnerability · Published Oct 2, 2026 · Assigned by VulnCheck

CVE-2026-103763SiYuan before v3.8.5 Information Disclosure via /api/notebook/getNotebookInfo

Medium 5.8

In plain English

A medium-severity information exposure in siyuan from siyuan-note. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities).

Severity (CVSS 3.1)5.8Medium

Exploit odds (30 days)0.3%top 75.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
siyuan-note	siyuan	0 – before 3.8.5

Weakness: CWE-200 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

References

GitHub Security Advisory (GHSA-ccxp-q3vg-jvgj) vendor-advisory
VulnCheck Advisory: SiYuan before v3.8.5 Information Disclosure via /api/notebook/getNotebookInfo third-party-advisory