# CVE-2026-104410: SiYuan information disclosure in export preview API

Source: https://junglewise.ai/threats/cve-2026-104410-siyuan-before-3-8-5-contains-an-information-disclosure  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-02. Updated: 2026-10-05  
License: CC BY 4.0 with a link back

CVE-2026-104410 · Severity: high · CVSS 7.5 · Published 2026-10-02

SiYuan is a note-taking application that supports publishing documents and embedding database views. An attacker who can access published documents can exploit the /api/export/preview endpoint to read the full contents of database rows from password-protected or unpublished documents, bypassing access controls. This leaks sensitive data such as primary keys and cell values that the document owner intended to keep private.

Technologies: [SiYuan](https://junglewise.ai/threats/technologies/siyuan). Vendors: [SiYuan](https://junglewise.ai/threats/vendors/siyuan).

## Quick answers

**Is CVE-2026-104410 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-104410 being exploited in the wild.

**How severe is CVE-2026-104410?** High severity, with a CVSS score of 7.5, published 2 October 2026.

**Which products and versions are affected?** SiYuan before 3.8.5.

**Is there a fix for CVE-2026-104410?** Yes: fixed in v3.8.5. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-104410 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-104410?** Check whether you run SiYuan at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in v3.8.5

## Technical details

The /api/export/preview endpoint fails to apply publish-access filtering when serializing database (attribute-view) rows, unlike the parallel renderAttributeView API which correctly filters protected rows. An unauthenticated or publish-reader-authenticated attacker can request an export preview of a public document that embeds a database view aggregating rows from protected documents, causing all row data including protected content to be returned in the response HTML without redaction.

## Affected products

- SiYuan SiYuan before 3.8.5

## Timeline

- 2026-09-17: disclosed
- 2026-10-02: advisory

## References

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

## Related threats

- [SiYuan path traversal in web fetch](https://junglewise.ai/threats/cve-2026-126776-siyuan-3-7-0-before-3-8-10-on-windows-contains-a-path-traversal)
- [SiYuan publish filter information disclosure in local storage](https://junglewise.ai/threats/go-2026-6836-siyuan-the-publish-filter-for-local-storage-returns-the-7f022e62)
- [SiYuan path traversal via GLOBALROOT alias bypass](https://junglewise.ai/threats/cve-2026-118680-siyuan-3-8-7-through-3-8-8-fails-to-normalize-windows-globalroot)
- [SiYuan SQL injection in history search](https://junglewise.ai/threats/cve-2026-116170-siyuan-before-v3-8-7-contains-an-sql-injection-vulnerability)
- [SiYuan cross-site scripting in /check-auth redirect](https://junglewise.ai/threats/cve-2026-116167-siyuan-from-2-9-0-before-3-8-7-contains-a-cross-site-scripting)