---
id: CVE-2026-94423
title: >-
  Net::LibSSH versions before 0.004 for Perl authenticate to an unverified
  server because connect never checks the host key against known_hosts
summary: >-
  Net::LibSSH versions before 0.004 for Perl authenticate to an unverified
  server because connect never checks the host key against known_hosts.


  connect reports success as soon as ssh_connect returns SSH_OK. libssh leaves
  the known-hosts …
severity: none
cwe:
  - CWE-322
product: Net-LibSSH
affected:
  - Net-LibSSH < 0.004
published: '2026-10-21'
updated: '2026-10-22'
sourceUpdated: '2026-10-22T00:16:44.795Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-94423'
references:
  - url: 'https://metacpan.org/release/GETTY/Net-LibSSH-0.004/changes'
  - url: >-
      https://github.com/Getty/p5-net-libssh/commit/29f509aacddb4b282ac9eb716d5ab326686d09a4.patch
tags:
  - cve.org
ingestedAt: '2026-10-21T22:18:33.751Z'
---

## Overview

Net::LibSSH versions before 0.004 for Perl authenticate to an unverified server because connect never checks the host key against known_hosts.

connect reports success as soon as ssh_connect returns SSH_OK. libssh leaves the known-hosts check to the application, and this binding never makes it, so the strict_hostkeycheck and knownhosts options are set on the session and then decide nothing.

Password, agent and public-key authentication, channel and SFTP operations all run on a session whose peer was never identified, so an attacker who can redirect the connection receives the password when password authentication is used, and commands and data sent over the session.

## Affected

- `Net-LibSSH < 0.004`

## Remediation

Upgrade to Net-LibSSH 0.004 or later.