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VulnerabilityPublished

CVE-2026-40884: patrickhener goshs · Missing Authentication

Affects patrickhener goshsSource CVE Database V5

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Not known to be exploited · CVSS 9.8 Critical : upgrade to 2.0.0-beta.6 as a priority.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.

Contested

Critical score, yet low EPSS after six months
EPSS
0.4% chance of exploitation in 30 days – higher than 41% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 2.0.0-beta.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 21 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade patrickhener goshs to 2.0.0-beta.6.

Affected software

ProductAffectedFixed in
patrickhenergoshsAffected
  • <2.0.0-beta.6
Fixed in
  • 2.0.0-beta.6
Gogithub.com/patrickhener/goshspkg:golang/github.com/patrickhener/goshsOther threatsAffected
  • =2.0.0-beta.6
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade goshs to version 2.0.0-beta.6 or later, where this authentication bypass vulnerability is fixed. Patch status is confirmed by the description stating the issue is fixed in 2.0.0-beta.6.

Description

CVE-2026-40884 is a critical vulnerability in goshs, a SimpleHTTPServer written in Go, affecting versions prior to 2.0.0-beta.6. The issue arises when the server is started with the -b ':pass' option together with -sftp, causing goshs to accept the configuration but fail to install any SFTP password handler. This results in an authentication bypass allowing unauthenticated network attackers to access files via the SFTP service without a password. The vulnerability is fixed in version 2.0.0-beta.6.

References

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