CVE-2026-62325: goshs SFTP authentication bypass via empty password handler logic

CVE-2026-62325 · Severity: critical · CVSS 9.1 · Published 2026-07-28

goshs is a file server tool used by developers and security professionals to quickly share files over a network. A security flaw in the SFTP component allows unauthorized users to access, download, or delete files without providing a password if the server is configured with a username but no password. This could lead to the complete exposure or loss of sensitive data hosted on the server.

Technologies: github.com/patrickhener/goshs/v2 (Go), goshs.de/goshs (Go), goshs.de/goshs/v2 (Go). Vendors: Go.

Quick answers

Is CVE-2026-62325 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-62325 being exploited in the wild.
How severe is CVE-2026-62325?
Critical severity, with a CVSS score of 9.1, published 28 July 2026.
Which products and versions are affected?
github.com/patrickhener/goshs/v2 (Go) = 2.1.3, SEMVER:introduced=2.1.3,fixed=2.1.4; goshs.de/goshs (Go) SEMVER:introduced=0; goshs.de/goshs/v2 (Go) = 2.1.3, SEMVER:introduced=2.1.3,fixed=2.1.4.
Is there a fix for CVE-2026-62325?
Yes. github.com/patrickhener/goshs/v2 (Go): upgrade to 2.1.4 or later; goshs.de/goshs/v2 (Go): upgrade to 2.1.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-62325 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-62325?
Check whether you run github.com/patrickhener/goshs/v2 (Go), goshs.de/goshs (Go) or goshs.de/goshs/v2 (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • github.com/patrickhener/goshs/v2 (Go): upgrade to 2.1.4 or later
    go get github.com/patrickhener/goshs/v2@v2.1.4
  • goshs.de/goshs/v2 (Go): upgrade to 2.1.4 or later
    go get goshs.de/goshs/v2@v2.1.4

Technical details

A vulnerability in `sftpserver/sftpserver.go` exists because the SFTP password handler is only initialized if both a username and password are non-empty (`Username != "" && Password != ""`). When a user starts goshs with a username but an empty password (e.g., `-b 'admin:' -sftp`) and no public key file (`-fkf`), the `PasswordHandler` remains nil. The underlying `gliderlabs/ssh` library defaults to `NoClientAuth = true` when all authentication handlers are nil, allowing remote attackers to connect via SFTP without any credentials. This is an incomplete fix for a previous vulnerability (CVE-2026-40884) which only addressed empty usernames. The issue is resolved in version 2.1.4 by changing the logic to use an OR (`||`) operator, ensuring the handler is installed if either credential is provided.

Affected products

  • goshs-labs goshs >= 2.1.3, < 2.1.4

Identifiers

  • CVE-2026-62325
  • GHSA-rjrw-mjq6-hpmm
  • GO-2026-6132

Timeline

  • 2026-06-26: disclosed: GHSA-rjrw-mjq6-hpmm published
  • 2026-07-03: patched: Version 2.1.4 released
  • 2026-07-28: advisory: NVD published CVE-2026-62325

References

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