Vulnerability · Published Jul 28, 2026 · Assigned by GitHub_M

CVE-2026-66063goshs has a Path Traversal issue

Medium 6.5

In plain English

A medium-severity path traversal in goshs from goshs-labs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.3%top 72.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/patrickhener/goshs	no fix listed	GHSA-wg2q-39h6-66x9
Go	github.com/patrickhener/goshs	no fix listed	GO-2026-6137
Go	github.com/patrickhener/goshs/v2	2.1.5-0.20260727065949-f3ef599e4091	GHSA-wg2q-39h6-66x9
Go	goshs.de/goshs	no fix listed	GHSA-wg2q-39h6-66x9
Go	goshs.de/goshs	no fix listed	GO-2026-6137
Go	goshs.de/goshs/v2	2.1.5-0.20260727065949-f3ef599e4091	GHSA-wg2q-39h6-66x9
Go	goshs.de/goshs/v2	2.1.5-0.20260727065949-f3ef599e4091	GO-2026-6137

Affected products (as reported)

Vendor	Product	Versions
goshs-labs	goshs	< 2.1.5

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

References

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