CVE-2026-66063 Details
Description
goshs is a feature-rich single-binary file server for red teamers and developers. Prior to 2.1.5, the httpserver/updown.go multipart upload handler split part.FileName() on / but did not reject .., allowing an unauthenticated upload with filename .. to create a file outside the served tree. This issue is fixed in version 2.1.5.
A path traversal vulnerability has been identified in goshs, a single-binary file server for red teamers and developers, in versions through 2.1.4. The issue arises in the multipart upload handler, which improperly handles filenames by splitting them on the path separator but failing to reject dot-dot sequences. This oversight allows unauthenticated uploads with filenames containing '..' to create files outside the intended directory structure. The vulnerability has been confirmed to write files beyond the webroot, exploiting the default configuration.
Users are advised to update to goshs version 2.1.5, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 28, 2026CISA-ADP
Assessed Jul 29, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/goshs-labs/goshs/commit/f3ef599e409151d1380866e47de8b1afb0bb54fa | [email protected] | Source CodeVendor |
| https://github.com/goshs-labs/goshs/security/advisories/GHSA-wg2q-39h6-66x9 | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-22 | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| goshs | <= 2.1.4 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 29, 2026 | CVE Modified | CISA-ADP |
| Jul 28, 2026 | New CVE Received | [email protected] |