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CVE-2026-40884

9.8 critical SSVC exploitation: poc Analyzed

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.

Fix

Patch, vendor advisory and mitigation references on NVD 2

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 9.8 · goshsNVD modified 2026-10-26 21:10

Affected (CPE criteria) 6

  • cpe:2.3:a:goshs:goshs:*:*:*:*:*:go:*:*
  • cpe:2.3:a:goshs:goshs:2.0.0:beta1:*:*:*:go:*:*
  • cpe:2.3:a:goshs:goshs:2.0.0:beta2:*:*:*:go:*:*
  • cpe:2.3:a:goshs:goshs:2.0.0:beta3:*:*:*:go:*:*
  • cpe:2.3:a:goshs:goshs:2.0.0:beta4:*:*:*:go:*:*
  • cpe:2.3:a:goshs:goshs:2.0.0:beta5:*:*:*:go:*:*

References 2