CVE-2026-94423

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.

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/Getty/p5-net-libssh/commit/29f509aacddb4b282ac9eb716d5ab326686d09a4.patch
https://metacpan.org/release/GETTY/Net-LibSSH-0.004/changes
http://www.openwall.com/lists/oss-security/2026/10/21/29

Configurations

No configuration.

History

30 Oct 2026, 18:18

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 9.1

22 Oct 2026, 01:17

Type	Values Removed	Values Added
References		() http://www.openwall.com/lists/oss-security/2026/10/21/29 -

21 Oct 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-21 22:16

Updated : 2026-10-30 18:18

NVD link : CVE-2026-94423

Mitre link : CVE-2026-94423

CVE.ORG link : CVE-2026-94423

JSON object : View

Products Affected

No product.

CWE

CWE-322

Key Exchange without Entity Authentication

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