{"id":"CVE-2026-42189","revision":"1234bc11637446979a69d107caac3bd0","records":[{"revision":"1234bc11637446979a69d107caac3bd0","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-42189","aliases":[],"title":"Russh: Pre-auth DoS via unbounded allocation in keyboard-interactive auth","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.","state":0,"publishedAt":"2026-05-08T19:49:51.179+00:00","modifiedAt":"2026-05-11T14:23:49.308+00:00","affected":[{"ecosystem":"Vendor product","name":"russh","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Eugeny\",\n                    \"product\": \"russh\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 0.60.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmg","https://github.com/Eugeny/russh/commit/6c3c80a9b6d60763d6227d60fa8310e57172a4d1","https://github.com/Eugeny/russh/releases/tag/v0.60.1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-42189","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-42189","identifiers":["CVE-2026-42189"]},"retained":false,"historicalAffected":[]}],"coverage":[]}