CVE-2026-126264
Deferred Deferred - Pending Action

SiYuan Information Disclosure via Widget Credentials Exposure

Publication date: 2026-11-13

Last updated on: 2026-11-13

Assigner: VulnCheck

Description
SiYuan before 3.8.9 contains an information disclosure vulnerability that allows authenticated Reader users to retrieve credential-named widget files by bypassing the sensitive-path guard in getFile. Attackers can request paths like /data/widgets/<package>/credentials.json for publish-referenced widgets to obtain API keys, tokens, or other stored secrets.

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Meta Information

Published
2026-11-13
Last Modified
2026-11-13
Generated
2026-11-13
AI Q&A
2026-11-13
EPSS Evaluated
N/A
NVD
CVE-2026-126264
EUVD
EUVD-2026-125257

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
siyuan siyuan to 3.8.9 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-200 The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

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Executive Summary

SiYuan before 3.8.9 has an information disclosure vulnerability where authenticated Reader users can access credential-named widget files by bypassing a sensitive-path guard. This allows requesting paths like /data/widgets/<package>/credentials.json to retrieve API keys, tokens, or other secrets from publish-referenced widgets.

Detection Guidance

Check SiYuan logs for unauthorized access to /data/widgets/<package>/credentials.json paths. Monitor network traffic for requests to these endpoints. Inspect file system for unexpected access to credential-named widget files.

Impact Analysis

Attackers with Reader access could steal stored secrets such as API keys or tokens, potentially leading to unauthorized access to external services, data breaches, or further exploitation of integrated systems.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating confidentiality requirements under GDPR and HIPAA. Organizations may face compliance violations, legal penalties, and reputational damage due to potential data exposure.

Mitigation Strategies

Upgrade SiYuan to version 3.8.9 or later. Restrict access to sensitive widget files. Review and rotate any exposed API keys or tokens. Implement stricter path validation in the application.

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