{"id":"UBUNTU-CVE-2026-42189","details":"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.","modified":"2026-10-17T12:58:54.478942575Z","published":"2026-05-08T20:16:00Z","upstream":["CVE-2026-42189"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-42189"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-42189"},{"type":"REPORT","url":"https://github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmg"}],"affected":[{"package":{"name":"rust-russh","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/rust-russh?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.57.1-2"],"ecosystem_specific":{"binaries":[{"binary_name":"librust-russh-dev","binary_version":"0.57.1-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42189.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}