CVE-2026-40884

CRITICAL

goshs: Empty-username SFTP password authentication bypass in goshs

Title source: cna

Description

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.

References (1)

[X_Refsource_Confirm] https://github.com/patrickhener/goshs/security/advisories/GHSA-c29w-qq4m-2gcv

Scores

CVSS v3 9.8

EPSS 0.0006

EPSS Percentile 19.3%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact total

Details

CWE

CWE-306

Status published

Products (3)

goshs/goshs 2.0.0 beta1 (5 CPE variants)

goshs/goshs < 2.0.0

patrickhener/goshs < 2.0.0-beta.6

Published Apr 21, 2026

Tracked Since Apr 22, 2026