CVE-2026-42189
Last modified
CVE-2026-42189 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.48% chance of exploitation in the next 30 days.
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/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Russh Project | Russh | < 0.60.1 |
| Warpgate Project | Warpgate | < 0.23.1 |
References
- https://github.com/Eugeny/russh/releases/tag/v0.60.1Product, Release Notes
- https://github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmgExploit, Mitigation, Vendor Advisory
- https://github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmgExploit, Mitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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