{"id":"CVE-2026-94423","aliases":["EUVD-2026-107577","GHSA-5q49-7p5p-mjwf"],"status":"published","title":"Net::LibSSH versions before 0.004 for Perl authenticate to an unverified server because connect never checks the host key against known_hosts","description":"Net::LibSSH versions before 0.004 for Perl authenticate to an unverified server because connect never checks the host key against known_hosts.\n\nconnect 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.\n\nPassword, 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.","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-10","score":0.0044,"percentile":0.3859,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-322"],"published":"2026-10-21T21:22:48Z","modified":"2026-11-01T02:31:02Z","references":[{"url":"https://metacpan.org/release/GETTY/Net-LibSSH-0.004/changes","tags":["release-notes","advisory"]},{"url":"https://github.com/Getty/p5-net-libssh/commit/29f509aacddb4b282ac9eb716d5ab326686d09a4.patch","tags":["patch","fix"]},{"url":"http://www.openwall.com/lists/oss-security/2026/10/21/29","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-94423","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-5q49-7p5p-mjwf"},{"url":"https://cpan.org/modules","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/94xxx/CVE-2026-94423.json","tags":["advisory"]},{"url":"https://github.com/Getty/p5-net-libssh","tags":["package"]}],"sources":{"cve":[{"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","description":"Net::LibSSH versions before 0.004 for Perl authenticate to an unverified server because connect never checks the host key against known_hosts.\n\nconnect 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.\n\nPassword, 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.","status":"published","published":"2026-10-21T21:22:48.593Z","modified":"2026-10-30T17:22:58.601Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"adp"}],"cwes":["CWE-322"],"updated_at":"2026-11-02T14:19:53.786088Z"}],"euvd":[{"id":"EUVD-2026-107577","description":"Net::LibSSH versions before 0.004 for Perl authenticate to an unverified server because connect never checks the host key against known_hosts.\n\nconnect 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.\n\nPassword, 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.","status":"published","published":"2026-10-21T21:22:48Z","modified":"2026-10-30T17:22:58Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T16:59:03.451007Z"}],"ghsa":[{"id":"GHSA-5q49-7p5p-mjwf","title":"Net::LibSSH versions before 0.004 for Perl authenticate to an unverified server because connect...","description":"Net::LibSSH versions before 0.004 for Perl authenticate to an unverified server because connect never checks the host key against known_hosts.\n\nconnect 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.\n\nPassword, 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.","status":"published","published":"2026-10-22T00:31:59Z","modified":"2026-10-30T18:33:33Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-322"],"updated_at":"2026-11-02T15:14:52.01816Z"}],"nvd":[{"id":"CVE-2026-94423","description":"Net::LibSSH versions before 0.004 for Perl authenticate to an unverified server because connect never checks the host key against known_hosts.\n\nconnect 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.\n\nPassword, 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.","status":"published","published":"2026-10-21T22:16:50.48Z","modified":"2026-10-30T18:18:20.44Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"secondary"}],"cwes":["CWE-322"],"updated_at":"2026-11-02T14:13:02.371082Z"}],"osv":[{"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","description":"Net::LibSSH versions before 0.004 for Perl authenticate to an unverified server because connect never checks the host key against known_hosts.\n\nconnect 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.\n\nPassword, 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.","status":"published","published":"2026-10-21T21:22:48.593Z","modified":"2026-11-01T02:31:02.318570868Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-322"],"updated_at":"2026-11-02T15:45:20.931171Z"}]}}