CVE-2026-42189

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/Eugeny/russh/commit/6c3c80a9b6d60763d6227d60fa8310e57172a4d1	Patch
https://github.com/Eugeny/russh/releases/tag/v0.60.1	Product Release Notes
https://github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmg	Exploit Mitigation Vendor Advisory
https://github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmg	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:russh_project:russh::::::rust::*
	cpe:2.3:a:warpgate_project:warpgate::::::::

History

No history.

Information

Published : 2026-05-08 20:16

Updated : 2026-06-17 10:47

NVD link : CVE-2026-42189

Mitre link : CVE-2026-42189

CVE.ORG link : CVE-2026-42189

JSON object : View

Products Affected

warpgate_project

warpgate

russh_project

russh

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

CWE-789

Memory Allocation with Excessive Size Value

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