CVE-2026-42189

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

Russh is a Rust SSH client & server library. Prior to version 0.60.1, a pre-authentication denial-of-service vulnerability exists in the server's keyboard-interactive authentication handler. A malicious client can crash any russh-based server that implements keyboard-interactive auth (e.g., for 2FA/TOTP) with a single malformed packet, requiring no credentials. This issue has been patched in version 0.60.1.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-770 CWE-789

Affected software

No affected versions have been published.

Timeline

Published: May 8, 2026
Last modified: Jun 17, 2026
NVD status: Analyzed

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