siyuan-note SiYuan 3.5.4/3.8.6 Sensitive Path Denylist /api/import/importStdMd IsSensitivePath localPath information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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5.8$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in siyuan-note SiYuan 3.5.4/3.8.6. Affected by this vulnerability is the function IsSensitivePath of the file /api/import/importStdMd of the component Sensitive Path Denylist. The manipulation of the argument localPath leads to information disclosure. This vulnerability is traded as CVE-2026-116171. It is possible to initiate the attack remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in siyuan-note SiYuan 3.5.4/3.8.6. It has been rated as problematic. This issue affects the function IsSensitivePath of the file /api/import/importStdMd of the component Sensitive Path Denylist. The manipulation of the argument localPath with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. The summary by CVE is:

SiYuan 3.5.4 before 3.8.7 on Windows contains a sensitive-path denylist bypass in IsSensitivePath because the Windows extended-length prefix (\\?\) survives filepath.Clean and matches no forbidden prefix. Authenticated API callers can prepend the prefix to localPath in /api/import/importStdMd to copy workspace conf files, including the API token and TLS private keys, into assets served to unauthenticated clients.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-116171 since 10/25/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

Upgrading to version 3.8.7 eliminates this vulnerability.

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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: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (VulnCheck): 🔒

CVSSv2info

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

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

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 3.8.7

Timelineinfo

10/25/2026 Advisory disclosed
10/25/2026 +0 days CVE reserved
10/25/2026 +0 days VulDB entry created
10/25/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-116171 (🔒)
GCVE (CVE): GCVE-0-2026-116171
GCVE (VulDB): GCVE-100-426239

Entryinfo

Created: 10/25/2026 14:53
Changes: 10/25/2026 14:53 (79)
Complete: 🔍
Cache ID: 216::103

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