CVE-2026-61639

Received Received - Intake

Path Traversal in Wallos Self-Hosted Subscription Tracker

Publication date: 2026-08-31

Last updated on: 2026-08-31

Assigner: GitHub, Inc.

Description

Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.9.6, POST /endpoints/db/restore.php calls ZipArchive::extractTo() without validating entry names for ../ sequences. Admin uploads crafted zip with entry logos/../../endpoints/shell.php to write webshell to webroot. Extension filter only applies to post-extraction logo copy step. This issue has been patched in version 4.9.6.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-31

Last Modified

2026-08-31

Generated

2026-09-01

AI Q&A

2026-09-01

EPSS Evaluated

N/A

NVD

CVE-2026-61639

Affected Vendors & Products

Vendor	Product	Version / Range
wallos	wallos	to 4.9.6 (exc)

Helpful Resources

Exploitability

CWE

KEV

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

Executive Summary

Wallos is a self-hosted subscription tracker. A vulnerability in versions before 4.9.6 allows an attacker to upload a malicious zip file via POST /endpoints/db/restore.php. The ZipArchive::extractTo() function does not validate entry names for ../ sequences, enabling directory traversal. An attacker can craft a zip with an entry like logos/../../endpoints/shell.php to write a webshell to the webroot.

Detection Guidance

Check for unexpected files in the webroot, particularly shell.php or similar files in endpoints/ directory. Review logs for POST requests to /endpoints/db/restore.php with uploaded zip files containing ../ sequences in filenames.

Impact Analysis

This vulnerability allows an attacker with admin privileges to upload a malicious zip file and execute arbitrary code on the server. This could lead to full system compromise, data theft, or unauthorized access to sensitive information stored in the application.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating GDPR and HIPAA requirements for data protection and access control. Organizations using affected versions may face compliance violations, legal penalties, and reputational damage.

Mitigation Strategies

Upgrade Wallos to version 4.9.6 or later immediately. Remove any unauthorized files in the webroot, especially shell.php. Monitor for suspicious activity in the endpoints/ directory.

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