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CVE

CWE

Training

CVE-2026-42189

Published: May 8, 2026

Modified: May 11, 2026

PUBLISHED

CVSS v3.1

7.5

HIGH

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.

Vendor	Product	Versions
Eugeny	russh	affected `< 0.60.1`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

References

https://github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmg

x_refsource_CONFIRM

https://github.com/Eugeny/russh/commit/6c3c80a9b6d60763d6227d60fa8310e57172a4d1

x_refsource_MISC

https://github.com/Eugeny/russh/releases/tag/v0.60.1

x_refsource_MISC

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