CVE-2026-40884

CRITICAL

goshs: Empty-username SFTP password authentication bypass in goshs

Title source: cna
STIX 2.1

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)

Core 1
Core References

Scores

CVSS v3 9.8
EPSS 0.0048
EPSS Percentile 37.3%
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 (5)
goshs/goshs 2.0.0 beta1 (5 CPE variants)
goshs/goshs < 2.0.0
patrickhener/goshs 0Go
patrickhener/goshs 0 - 2.0.0Go
patrickhener/goshs < 2.0.0-beta.6
Published Apr 21, 2026
Tracked Since Apr 22, 2026