Directory Traversal in goshs POST Multipart Upload Pre-2.0.0-beta

Publication date: 2026-04-06

Last updated on: 2026-04-09

Assigner: GitHub, Inc.

Description

goshs is a SimpleHTTPServer written in Go. Prior to 2.0.0-beta.3, the POST multipart upload directory not sanitized. This vulnerability is fixed in 2.0.0-beta.3.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-04-06

Last Modified

2026-04-09

Generated

2026-07-06

AI Q&A

2026-04-07

EPSS Evaluated

2026-07-05

NVD

CVE-2026-35393

Affected Vendors & Products

Vendor	Product	Version / Range
goshs	goshs	2.0.0
goshs	goshs	to 2.0.0 (exc)
goshs	goshs	2.0.0

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

The vulnerability exists in goshs, a SimpleHTTPServer written in Go, where prior to version 2.0.0-beta.3, the POST multipart upload directory was not sanitized. This means that when files were uploaded via POST requests, the directory paths were not properly checked or cleaned, potentially allowing malicious input to affect the server.

Impact Analysis

This vulnerability can have a severe impact as indicated by its high CVSS score of 9.8. Because the upload directory is not sanitized, an attacker could exploit this to compromise the confidentiality, integrity, and availability of the system. This could lead to unauthorized access, data corruption, or denial of service.

Mitigation Strategies

To mitigate this vulnerability, upgrade goshs to version 2.0.0-beta.3 or later, where the POST multipart upload directory sanitization issue is fixed.

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