CVE-2026-40188

Goshs vulnerability

7.7 HIGHPublic exploitEPSS 0.39%

Published10 Apr 2026

Description

goshs is a SimpleHTTPServer written in Go. From 1.0.7 to before 2.0.0-beta.4, the SFTP command rename sanitizes only the source path and not the destination, so it is possible to write outside of the root directory of the SFTP. This vulnerability is fixed in 2.0.0-beta.4.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredLow

User interactionNone

ScopeChanged

ConfidentialityNone

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

Affected products

Goshs2.0.0 · ≥ 1.0.7 < 2.0.0

Remediation

Fixed in

Goshs≥ 2.0.0

Patch & vendor advisories

References

https://github.com/patrickhener/goshs/commit/141c188ce270ffbec087844a50e5e695b7da7744Patch
https://github.com/patrickhener/goshs/releases/tag/v2.0.0-beta.4ProductRelease Notes
https://github.com/patrickhener/goshs/security/advisories/GHSA-2943-crp8-38xxExploitVendor Advisory

Frequently asked

Is CVE-2026-40188 being actively exploited?

CVE-2026-40188 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.39%.

How severe is CVE-2026-40188?

CVE-2026-40188 has a CVSS 3.1 base score of 7.7, rated high. EPSS estimates a 0.39% probability of exploitation.

Which products are affected by CVE-2026-40188?

Affected products include Goshs.

How do I fix CVE-2026-40188?

Upgrade affected software to a fixed version, for example Goshs 2.0.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-40188 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation works Book a demo

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.