CVE-2023-42818

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

JumpServer is an open source bastion host. When users enable MFA and use a public key for authentication, the Koko SSH server does not verify the corresponding SSH private key. An attacker could exploit a vulnerability by utilizing a disclosed public key to attempt brute-force authentication against the SSH service This issue has been patched in versions 3.6.5 and 3.5.6. Users are advised to upgrade. There are no known workarounds for this issue.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-287 CWE-307

Affected software

No affected versions have been published.

Timeline

Published: Sep 27, 2023
Last modified: Jun 17, 2026
NVD status: Modified

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