CVE catalog

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 malicio

[CVE catalog]

Severity
High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
Source
[NVD] · [CVE record]
EPSS
0.48% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

DistributionPackageReleaseVersionStatus
CperusshNot reported0.60.1fixed
CpewarpgateNot reported0.23.1fixed
CperusshNot reported0.60.1fixed
CpewarpgateNot reported0.23.1fixed
Debianrust-russh140.57.1-1vulnerable
Debianrust-russh140.57.1-2vulnerable
Debianrust-russh140.64.1-1fixed

Fixed-version evidence

DistributionPackageTypeReleaseFixed versionUrgencyOriginBugs
CperusshcpeNot reported0.60.1Not reportedNot reportedNot reported
CpewarpgatecpeNot reported0.23.1Not reportedNot reportedNot reported
CperusshcpeNot reported0.60.1Not reportedNVD-CVE-2026-42189Not reported
CpewarpgatecpeNot reported0.23.1Not reportedNVD-CVE-2026-42189Not reported
Debianrust-russhdeb140.64.1-1Not reportedDEBIAN-CVE-2026-42189Not reported

OpenFactory catalog packages

No matching packages in this catalog.

Observed:

References

[FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]