CVE-2026-66063 | goshs is a feature-rich single-binary file server for red te… | CVSS 6.5 MEDIUM

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.

Metadata

CVE ID: CVE-2026-66063
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-07-23 23:25 UTC
Published: 2026-07-28 22:07 UTC
Last updated: 2026-07-28 22:07 UTC
Primary CWE: CWE-22
CWE-22: Improper Limitation of a Pathname to a Restricted Di…
Vendor / Product: goshs-labs / goshs
Sources: cve.org · NVD

Severity & Metrics

6.5 MEDIUM CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected products (1)

Vendor	Product	Platform	Versions
goshs-labs	goshs	—	< 2.1.5

Weakness (CWE)

CWE	Source	Description
CWE-22	cna	CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSS scores (1)

Score	Severity	Version	Source	Vector
6.5	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

References (2)

https://github.com/goshs-labs/goshs/security/advisories/GHSA-wg2q-39h6-66x9 https://github.com/goshs-labs/goshs/security/advisories/GHSA-wg2q-39h6-66x9
https://github.com/goshs-labs/goshs/commit/f3ef599e409151d1380866e47de8b1afb0bb54fa https://github.com/goshs-labs/goshs/commit/f3ef599e409151d1380866e47de8b1afb0bb54fa