CVE-2026-42189: Russh: Pre-auth DoS via unbounded allocation in keyboard-interactive auth
Eugeny · russh
Affected: Eugeny russh · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 42% of scored CVEs
DescriptionCVE.org
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.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Eugeny · russh< 0.60.1
On the Atlas
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CoverageNo articles yet
No CyberSIXT article names CVE-2026-42189 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.