Siyuan-Note SiYuan up to 3.8.4 Save Path Endpoints notebook ID missing authentication

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.17+

Summaryinfo

A vulnerability marked as problematic has been reported in Siyuan-Note SiYuan up to 3.8.4. The affected element is the function getRefCreateSavePath/getShorthandSavePath/getDocCreateSavePath of the component Save Path Endpoints. Performing a manipulation of the argument notebook ID results in missing authentication. This vulnerability is reported as CVE-2026-103762. The attack is possible to be carried out remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Siyuan-Note SiYuan up to 3.8.4. This affects the function getRefCreateSavePath/getShorthandSavePath/getDocCreateSavePath of the component Save Path Endpoints. The manipulation of the argument notebook ID with an unknown input leads to a missing authentication vulnerability. CWE is classifying the issue as CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. This is going to have an impact on confidentiality. The summary by CVE is:

SiYuan before v3.8.5 contains a missing authorization vulnerability in the getRefCreateSavePath, getShorthandSavePath, and getDocCreateSavePath endpoints that allows read-only publish visitors to learn unpublished notebook box IDs. Attackers with read-only or anonymous publish access can POST any open notebook ID to receive the global save-box ID and save-path template, revealing a hidden notebook's existence and creation time.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-103762 since 10/01/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 3.8.5 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.3
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Missing authentication
CWE: CWE-306 / CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: SiYuan 3.8.5

Timelineinfo

10/01/2026 CVE reserved
10/02/2026 +1 days Advisory disclosed
10/02/2026 +0 days VulDB entry created
10/02/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-103762 (🔒)
GCVE (CVE): GCVE-0-2026-103762
GCVE (VulDB): GCVE-100-413067

Entryinfo

Created: 10/02/2026 14:02
Changes: 10/02/2026 14:02 (78)
Complete: 🔍
Cache ID: 216::103

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