---
id: CVE-2026-90623
title: A weakness has been identified in andreashappe cochise up to 0.4.1
summary: >-
  A weakness has been identified in andreashappe cochise up to 0.4.1. Affected
  is the function asyncssh.connect of the file src/cochise/ssh_connection.py of
  the component SSH Host Key Handler. Executing a manipulation can lead to
  improper …
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-287
  - CWE-295
vendor: andreashappe
product: cochise
affected:
  - cochise 0.4.0
  - cochise 0.4.1
published: '2026-09-14'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T20:56:48.220'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90623'
references:
  - url: 'https://github.com/andreashappe/cochise/'
    label: cna@vuldb.com
  - url: 'https://github.com/andreashappe/cochise/issues/13'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-90623'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/914815'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/403205'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/403205/cti'
    label: cna@vuldb.com
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-14T15:48:25.626549Z'
ingestedAt: '2026-09-14T15:23:07.467Z'
epss: 0.00276
epssPercentile: 0.17885
---

## Overview

A weakness has been identified in andreashappe cochise up to 0.4.1. Affected is the function asyncssh.connect of the file src/cochise/ssh_connection.py of the component SSH Host Key Handler. Executing a manipulation can lead to improper certificate validation. The attack may be launched remotely. The attack requires a high level of complexity. The exploitability is told to be difficult. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.