Is CVE-2026-40884 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-40884 being exploited in the wild.

How severe is CVE-2026-40884?

Critical severity, with a CVSS score of 9.8, published 21 April 2026.

Which products and versions are affected?

github.com/patrickhener/goshs (Go) <= 1.1.4, SEMVER:introduced=0, SEMVER:introduced=0,last_affected=1.1.4; github.com/patrickhener/goshs/v2 (Go) < 2.0.0, SEMVER:introduced=0,fixed=2.0.0.

Is there a fix for CVE-2026-40884?

Yes. github.com/patrickhener/goshs/v2 (Go): upgrade to 2.0.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Am I affected by CVE-2026-40884?

Check whether you run github.com/patrickhener/goshs (Go), github.com/patrickhener/goshs/v2 (Go) or Goshs 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.

CVE-2026-40884: goshs has an empty-username SFTP password authentication bypass

Q: Is there a fix for CVE-2026-40884?

Yes. github.com/patrickhener/goshs/v2 (Go): upgrade to 2.0.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: Am I affected by CVE-2026-40884?

Check whether you run github.com/patrickhener/goshs (Go), github.com/patrickhener/goshs/v2 (Go) or Goshs 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.

CVE-2026-40884 · Severity: critical · CVSS 9.8 · 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.

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

Quick answers

Is CVE-2026-40884 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-40884 being exploited in the wild.
How severe is CVE-2026-40884?: Critical severity, with a CVSS score of 9.8, published 21 April 2026.
Which products and versions are affected?: github.com/patrickhener/goshs (Go) <= 1.1.4, SEMVER:introduced=0, SEMVER:introduced=0,last_affected=1.1.4; github.com/patrickhener/goshs/v2 (Go) < 2.0.0, SEMVER:introduced=0,fixed=2.0.0.
Is there a fix for CVE-2026-40884?: Yes. github.com/patrickhener/goshs/v2 (Go): upgrade to 2.0.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-40884?: Check whether you run github.com/patrickhener/goshs (Go), github.com/patrickhener/goshs/v2 (Go) or Goshs 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 2.0.0 or later
```
go get github.com/patrickhener/goshs/v2@v2.0.0
```

Affected products

github.com/patrickhener/goshs (Go) <= 1.1.4, SEMVER:introduced=0, SEMVER:introduced=0,last_affected=1.1.4
github.com/patrickhener/goshs/v2 (Go) < 2.0.0, SEMVER:introduced=0,fixed=2.0.0
Goshs

Identifiers

CVE-2026-40884
GHSA-c29w-qq4m-2gcv
GO-2026-5303

References

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