CVE-2026-40884

goshs: Empty-username SFTP password authentication bypass in goshs

State: Published
Severity: 9.8 Critical
Published: Apr 21, 2026
Updated: Apr 22, 2026
Reserved: Apr 15, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	GitHub_M

Weaknesses

CWE-306 Missing Authentication for Critical Function

Affected Products

Product	Versions
goshspatrickhener	< 2.0.0-beta.6Affected

References

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

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