by Kastro
Paper/Archive/CVE-2026-40884

CVE-2026-40884

patrickhener goshs — goshs: Empty-username SFTP password authentication bypass in goshs

EPSS 0.5%public exploitCVSS 9.8
critical.is priorityof 100
48
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 41.3.413 × 208.3Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
goshs< 2.0.0-beta.6–CNA

Scores by source

GitHub_M (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

exploitgithub.com/patrickhener/goshs/security/advisories/GHSA-c29w-qq4m-2gcv