{"cve":"CVE-2026-42189","nvd":{"published":"2026-05-08T20:16:31.443","modified":"2026-10-26T18:10:00.173","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"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},"cwes":["CWE-770","CWE-789"],"references":["https://github.com/Eugeny/russh/commit/6c3c80a9b6d60763d6227d60fa8310e57172a4d1","https://github.com/Eugeny/russh/releases/tag/v0.60.1","https://github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmg","https://github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmg"],"products":["russh_project:russh","warpgate_project:warpgate"],"source":"nvd","synced_at":"2026-10-26T18:27:13.530666824+00:00"},"epss":{"cve":"CVE-2026-42189","score":0.00481,"percentile":0.41203,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-f5v4-2wr6-hqmg","url":"https://osv.dev/vulnerability/GHSA-f5v4-2wr6-hqmg","summary":"russh has pre-auth DoS via unbounded allocation in its keyboard-interactive auth handler","modified":"2026-09-10T03:51:01.594715460Z","packages":[{"ecosystem":"crates.io","name":"russh","purl":"pkg:cargo/russh","ranges":["<0.60.1"],"fixed":["0.60.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}