CVE-2026-40884

moderate-risk

Published 2026-04-21

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.

Do I need to act?

0.07% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 9.8/10 Critical

NETWORK / LOW complexity

Affected Products (6)

Goshs

Affected Vendors

Goshs

References (2)

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

/ 100

moderate-risk

Severity 32/34 · Critical

Exploitability 0/34 · Minimal

Exposure 13/34 · Low