{"id":"CVE-2026-42189","summary":"Russh: Pre-auth DoS via unbounded allocation in keyboard-interactive auth","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.","aliases":["GHSA-f5v4-2wr6-hqmg"],"modified":"2026-07-15T01:48:58.664164142Z","published":"2026-05-08T19:49:51.179Z","related":["CGA-v8mf-jm25-j44r"],"database_specific":{"cwe_ids":["CWE-770","CWE-789"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42189.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/Eugeny/russh/releases/tag/v0.60.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42189.json"},{"type":"ADVISORY","url":"https://github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42189"},{"type":"FIX","url":"https://github.com/Eugeny/russh/commit/6c3c80a9b6d60763d6227d60fa8310e57172a4d1"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/eugeny/russh","events":[{"introduced":"0"},{"fixed":"5a6ca29ef2171b070433308fcf0e43785b608071"},{"fixed":"6c3c80a9b6d60763d6227d60fa8310e57172a4d1"}],"database_specific":{"cpe":"cpe:2.3:a:russh_project:russh:*:*:*:*:*:rust:*:*","extracted_events":[{"introduced":"0"},{"fixed":"0.60.1"}],"source":["CPE_RANGE","REFERENCES"]}},{"type":"GIT","repo":"https://github.com/warp-tech/warpgate","events":[{"introduced":"0"},{"fixed":"ffc755f0137944bd39cf4cbce90f4279da500943"}],"database_specific":{"source":"CPE_RANGE","cpe":"cpe:2.3:a:warpgate_project:warpgate:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"0.23.1"}]}}],"versions":["v0.60.0","v0.59.0","v0.58.0","v0.57.1","v0.57.0","v0.56.0","v0.55.0","v0.54.6","v0.54.5","v0.54.4","v0.54.3","v0.54.2","v0.54.1","v0.54.0","v0.53.0","v0.53.0-beta.1","v0.52.1","v0.52.0","v0.52.0-beta.1","v0.51.1","v0.51.0","v0.51.0-beta.3","v0.51.0-beta.2","v0.51.0-beta.1","v0.50.4","v0.50.3","v0.50.1","v0.50.0","v0.50.0-beta.12","v0.50.0-beta.11","v0.50.0-beta.10","v0.50.0-beta.9","v0.50.0-beta.8","v0.50.0-beta.7","v0.50.0-beta.6","v0.50.0-beta.5","v0.50.0-beta.4","v0.50.0-beta.3","v0.50.0-beta.2","v0.49.0","v0.48.2","v0.48.1","v0.48.0","v0.47.0-beta.4","v0.47.0-beta.3","v0.46.0","v0.45.0","v0.44.0","v0.44.0-beta.4","v0.44.0-beta.3","v0.44.0-beta.1","v0.43.0","v0.43.0-beta.1","v0.42.0","v0.40.2","v0.40.1","v0.40.0","v0.38.0","v0.39.0-beta.1","v0.38.0-beta.1","v0.37.1","v0.37.0","v0.36.1","v0.37.0-beta.1","0.37.0-beta.1","v0.35.0-beta.9","v0.35.0-beta.8","v0.35.0-beta.7","v0.35.0-beta.6","v0.35.0-beta.5","v0.35.0-beta.3","v0.35.0-beta.2","v0.35.0-beta.1","v0.34.0","v0.23.0","chart-v0.0.4","0.22.0-dl","v0.22.0-beta.6","v0.22.0-beta.5","v0.22.0-beta.4","v0.22.0-beta.3","chart-v0.0.3","chart-v0.0.2","v0.22.0-beta.2","v0.22.0-beta.1","v0.21.1","v0.21.0","v0.20.2","v0.20.1","v0.20.0","v0.19.1","v0.19.0","v0.18.0","v0.17.0","v0.16.0","v0.15.0","v0.15.0-beta.2","v0.15.0-beta.1","v0.14.1","v0.14.0","v0.14.0-beta.3","v0.14.0-beta.2","v0.14.0-beta.1","v0.13.2","v0.13.1","v0.13.0","v0.13.0-beta.2","v0.13.0-beta.1","v0.12.0","v0.12.0-beta.2","v0.12.0-beta.1","v0.11.0","v0.10.2","v0.10.1","v0.10.0","v0.9.1","v0.9.0","v0.8.1","v0.8.0","v0.7.4","v0.7.3","v0.7.2","v0.7.1","v0.7.0","v0.6.6","v0.6.5","v0.6.4","v0.6.3","v0.6.2","v0.6.1","v0.5.0","v0.4.0","v0.3.0","v0.2.0","v0.2.2","v0.2.1","v0.1.1","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42189.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}