Net::LibSSH versions before 0.004 for Perl authenticate to an unverified server because connect never checks the host key against known_hosts
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.
CVE-2026-94423
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-94423
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/Getty/p5-net-libssh",
"modules": [
"Net::LibSSH"
],
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "0.004",
"versionType": "custom"
}
],
"packageURL": "pkg:cpan/Net-LibSSH",
"packageName": "Net-LibSSH",
"programFiles": [
"LibSSH.xs"
],
"collectionURL": "https://cpan.org/modules",
"defaultStatus": "unaffected",
"programRoutines": [
{
"name": "Net::LibSSH::connect"
}
]
}
]- Related CVEs
- CVE-2026-94423
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #50038 · Revision 1
- Added to Heist Feed
- Publisher date