Is CVE-2026-103762 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-103762 being exploited in the wild.

How severe is CVE-2026-103762?

Medium severity, with a CVSS score of 5.3, published 2 October 2026.

Which products and versions are affected?

SiYuan Note SiYuan before 3.8.5.

Is there a fix for CVE-2026-103762?

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-2026-103762 attacked?

It is attacked over the network.

Am I affected by CVE-2026-103762?

Check whether you run SiYuan Note 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.

CVE-2026-103762: SiYuan missing authorization in save-path resolver endpoints

CVE-2026-103762 · Severity: medium · CVSS 5.3 · Published 2026-10-02

SiYuan is a note-taking application that administrators can configure to publish selected notebooks for read-only access by other users. Three internal API endpoints lack proper authorization checks, allowing read-only or anonymous publish visitors to discover the existence and creation time of unpublished notebooks that were configured as global save targets for new references, shorthand notes, or documents. While no document content is exposed, this reveals information the administrator intended to keep hidden.

Technologies: SiYuan Note SiYuan. Vendors: SiYuan Note.

Quick answers

Is CVE-2026-103762 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-103762 being exploited in the wild.
How severe is CVE-2026-103762?: Medium severity, with a CVSS score of 5.3, published 2 October 2026.
Which products and versions are affected?: SiYuan Note SiYuan before 3.8.5.
Is there a fix for CVE-2026-103762?: 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-2026-103762 attacked?: It is attacked over the network.
Am I affected by CVE-2026-103762?: Check whether you run SiYuan Note 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

Three endpoints (getRefCreateSavePath, getShorthandSavePath, getDocCreateSavePath) in the SiYuan kernel API perform missing authorization checks (CWE-862), allowing attackers with read-only publish access to retrieve the internal box ID of globally configured save-target notebooks that may not be published. The endpoints are registered with base authentication middleware only and return both the box ID (which encodes the notebook creation timestamp) and the rendered save-path template without verifying publish-access permissions. The vulnerability requires non-default configuration where an administrator has set a global save box to an unpublished notebook.

Affected products

siyuan-note SiYuan before 3.8.5

Timeline

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

References

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