CVE-2026-104410: SiYuan before 3.8.5 Information Disclosure via /api/export/preview

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-02 · updated 2026-10-02
Weakness: CWE-862

Description

SiYuan before 3.8.5 contains an information disclosure vulnerability that allows publish readers to read password-protected and publish-disabled database rows via the /api/export/preview endpoint. Attackers can request an export preview of a public document embedding a database view to obtain protected rows' primary-key text and cell values.

Affected products

siyuan-note siyuan: before 3.8.5 — fixed in 3.8.5

How to fix

Upgrade to a fixed version: siyuan-note siyuan 3.8.5. Check the vendor advisory for mitigations.

References

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-778g-gq49-fxxj
https://www.vulncheck.com/advisories/siyuan-before-3.8.5-information-disclosure-via-api-export-preview
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-778g-gq49-fxxj

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