CVE-2026-66063

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.

Score

CVSS 3.1 6.5 Medium

Status

Deferred - security-advisories@github.com

Published

2026-07-28

Last modified

2026-10-23

Weaknesses

CWE-22

Affected products

• Goshs (Goshs-labs)

References

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