CVE•Published 2026-05-08•Modified 2026-05-14•0 articles on news•6 live references•NVD data

CVE-2026-42189Russh_project · Russh

Vulnerability data via NVD (ingested)

CVSS v3.1

7.5

HIGH

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

EPSS percentile

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Weaknesses (CWE)

CWE-770Allocation of Resources Without Limits or Throttling CWE-789Memory Allocation with Excessive Size Value

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.

Timeline

Published 2026-05-08

Modified 2026-05-14

External references

NVD MITRE Exploit-DB GitHub PoC Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-42189

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Russh Project Russh"

All exposed Russh Project Russh instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Russh"

HTTP body or banner mentions "Russh" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-42189