CVE-2026-111915
Received Received - Intake

Path Traversal in Yank Note Before 3.93.1

Publication date: 2026-10-19

Last updated on: 2026-10-19

Assigner: VulnCheck

Description
Yank Note before 3.93.1 contains a path traversal vulnerability that allows unauthenticated remote attackers to read arbitrary files via the path or doc parameter of /api/help. Attackers can supply repeated '../' segments, which bypass the single-replacement sanitization in the publicly allowlisted endpoint, to read SSH keys, configuration, or notes.

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Meta Information

Published
2026-10-19
Last Modified
2026-10-19
Generated
2026-10-19
AI Q&A
2026-10-19
EPSS Evaluated
N/A
NVD
CVE-2026-111915
EUVD
EUVD-2026-104318

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
purocean Yank Note 0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-22 The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Attack-Flow Graph

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Executive Summary

CVE-2026-111915 is a path traversal vulnerability in Yank Note versions before 3.93.1. It allows unauthenticated remote attackers to read arbitrary files via the path or doc parameter in the /api/help endpoint. Attackers exploit this by supplying repeated '../' segments to bypass single-replacement sanitization, enabling access to sensitive files like SSH keys, configuration files, or notes.

Detection Guidance

Check if Yank Note is running an outdated version before 3.93.1 by inspecting the application version or server logs. Test the /api/help endpoint with crafted path parameters containing '../' sequences to see if arbitrary files can be accessed. Example: curl 'http://<target>/api/help?path=../../../../etc/passwd'

Monitor network traffic for repeated '../' patterns in requests to /api/help. Verify if the application logs show unauthorized file access attempts or path traversal patterns.

Impact Analysis

This vulnerability allows attackers to read sensitive files on the system where Yank Note is running. If exploited, it could lead to unauthorized access to confidential data, including SSH keys, configuration files, or user notes. The impact depends on the permissions of the application's OS user.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive files such as configuration files, SSH keys, or notes, which may contain personal or confidential data. Such exposure risks violating GDPR's data protection principles and HIPAA's safeguards for protected health information if the affected system processes such data.

Mitigation Strategies

Upgrade Yank Note to version 3.93.1 or later immediately to patch the path traversal flaw. If upgrading is not possible, restrict access to the /api/help endpoint via firewall rules or disable it entirely.

Review server configurations to ensure strict path validation is enforced. Remove any unauthenticated access to sensitive endpoints and implement proper input sanitization for all file-related operations.

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