CVE-2026-40884 CRITICAL

CVE-2026-40884: goshs: Empty-username SFTP password authentication bypass in goshs

Vendor Patrickhener
Product goshs
Weakness CWE-306 · Missing auth
Published April 21, 2026
Last update April 22, 2026
View on NVD All CVEs

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

goshs is a SimpleHTTPServer written in Go. Prior to 2.0.0-beta.6, goshs contains an SFTP authentication bypass when the documented empty-username basic-auth syntax is used. If the server is started with -b ':pass' together with -sftp, goshs accepts that configuration but does not install any SFTP password handler. As a result, an unauthenticated network attacker can connect to the SFTP service and access files without a password. This vulnerability is fixed in 2.0.0-beta.6.

Key dates

02Disclosure timeline

April 21, 2026 CVE published
April 22, 2026 Record updated