CVE Catalog

CVE-2026-94423

CriticalCVSS 9.1
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.44%

38th percentile - higher than 38% of all known CVEs

Summary

Net::LibSSH versions before 0.004 for Perl authenticate to an unverified server because connect never checks the host key against known_hosts. Password, agent and public-key authentication, channel and SFTP operations all run on a session whose peer was never identified.

Risk Assessment

An attacker able to redirect the connection can capture the password and commands/data sent over the session, compromising confidentiality and integrity.

Recommendation

Upgrade Net::LibSSH to 0.004 or later; until then, avoid password authentication over untrusted networks.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS