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Critical, CVSS 9.1amended

goshs SFTP authentication bypass via empty password (incomplete fix of CVE-2026-40884)

CVE-2026-62325GHSA-rjrw-mjq6-hpmm

What to do

Partial vendor fix. Follow the primary source's mitigation guidance and check back for a fix.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • Go goshs.de/goshs

    Affected
    every version
    Fixed in
    no fixed version recorded

  • Go goshs.de/goshs/v2

    Affected
    >= 2.1.3, <= 2.1.3
    Fixed in
    2.1.4

  • Go github.com/patrickhener/goshs/v2

    Affected
    >= 2.1.3, <= 2.1.3
    Fixed in
    2.1.4

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
9.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS
  • CVE-2026-62325: 0.43% estimated exploitation activity in the next 30 days; percentile 36.94 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Summary Start goshs v2.1.3 with -b 'admin:' -sftp. No -fkf. SFTP accepts connections without password. CVE-2026-40884 blocks the empty-username variant (-b ':pass'). The empty-password variant bypasses that fix. CVE-2026-40884 CVE-2026-40884 (GHSA-c29w-qq4m-2gcv, Apr 13 2026) reported the empty-username case: -b ':pass' with -sftp. sftpserver.go:85 uses &&: Empty username → Username != "" false → PasswordHandler nil. No -fkf means PublicKeyHandler also nil. gliderlabs/ssh sees all handlers nil and sets NoClientAuth = true. Unauthenticated access. Patrickhener fixed it with a sanity check at sanity/checks.go:114-118: HasPrefix(":") catches empty username. It does not catch empty password. Empty Password Bypass Same && at sftpserver.go:85. Same nil handler. Different input: - Username = "admin", Password = "" - Username != "" && Password != "" → false. Password is empty. - PasswordHandler not set. No -fkf → PublicKeyHandler not set. - gliderlabs/ssh → NoClientAuth = true.…

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 3 · amended ·

    Amended from ghsa record GHSA-rjrw-mjq6-hpmm

  2. Revision 2 · amended ·

    Amended from osv record GO-2026-6132

  3. Revision 1 · created ·

    Published from osv record GHSA-rjrw-mjq6-hpmm

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2026-62325

Advisory: goshs SFTP authentication bypass via empty password (incomplete fix of CVE-2026-40884)
IDs: CVE-2026-62325, GHSA-rjrw-mjq6-hpmm
Record: https://patchnext.com/advisories/cve-2026-62325 (revision 3, source checked 26 Oct 2026, 15:27 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Partial vendor fix; fixed versions by package: goshs.de/goshs/v2 2.1.4; github.com/patrickhener/goshs/v2 2.1.4. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go goshs.de/goshs: affected every version
- Go goshs.de/goshs/v2: affected >= 2.1.3, <= 2.1.3; fixed in 2.1.4
- Go github.com/patrickhener/goshs/v2: affected >= 2.1.3, <= 2.1.3; fixed in 2.1.4

## Suggested inspection (read-only)
- Go goshs.de/goshs: check the installed version with your package manager.
- Go goshs.de/goshs/v2: check the installed version with your package manager.
- Go github.com/patrickhener/goshs/v2: check the installed version with your package manager.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on goshs.de/goshs, goshs.de/goshs/v2, github.com/patrickhener/goshs/v2.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-rjrw-mjq6-hpmm (OSV record GHSA-rjrw-mjq6-hpmm lists affected ranges: Go github.com/patrickhener/goshs/v2 >=2.1.3 =2.1.3 <2.1.4 (fixed))
- Verified: https://osv.dev/vulnerability/GO-2026-6132 (OSV record GO-2026-6132 lists affected ranges: Go goshs.de/goshs >=0; Go goshs.de/goshs/v2 >=2.1.3 <2.1.4 (fixed))
- Verified: https://github.com/advisories/GHSA-rjrw-mjq6-hpmm (GitHub-reviewed advisory GHSA-rjrw-mjq6-hpmm lists affected ranges: Go github.com/patrickhener/goshs/v2 >=2.1.3 =2.1.3 <=2.1.3)

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