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.
Affected products
russh_project: russh; warpgate_project: warpgate
References4
- github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmg ExploitMitigationVendor Advisory
- github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmg ExploitMitigationVendor Advisory
- github.com/Eugeny/russh/commit/6c3c80a9b6d60763d6227d60fa8310e5… Patch
- github.com/Eugeny/russh/releases/tag/v0.60.1 ProductRelease Notes
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 42 · as of 13 November 2026
- CWE
- CWE-770CWE-789
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.