CVE-2026-42189

7.5 HIGH
Published: May 08, 2026 Modified: May 14, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/Eugeny/russh/releases/tag/v0.60.1
Source: security-advisories@github.com
Product Release Notes
https://github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmg
Source: security-advisories@github.com
Exploit Mitigation Vendor Advisory
https://github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmg
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit Mitigation Vendor Advisory

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.5 / 10.0
EPSS (Exploit Probability)
0.5%
38th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

russh_project warpgate_project