CVE-2026-40884

goshs: Empty-username SFTP password authentication bypass in goshs

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.

Affected

patrickhener · goshs

CVSS v3.1 GITHUB

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

EPSS

0.65% chance of exploitation in the next 30 days, 50th percentile

Published

2026-04-21

Updated

2026-04-22

Proof-of-concept exploits (1)

• advisories/GHSA-c29w-qq4m-2gcv

Security advisories

• patrickhener/goshs/security/advisories/GHSA-c29w-qq4m-2gcv

References

• CVE Record
• NVD entry