{"id":"CVE-2026-42189","sourceIdentifier":"security-advisories@github.com","published":"2026-05-08T20:16:31.443","lastModified":"2026-06-17T10:47:29.173","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"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":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"Eugeny","product":"russh","versions":[{"version":"< 0.60.1","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-05-11T14:23:22.063007Z","id":"CVE-2026-42189","options":[{"exploitation":"poc"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-770"},{"lang":"en","value":"CWE-789"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:russh_project:russh:*:*:*:*:*:rust:*:*","versionEndExcluding":"0.60.1","matchCriteriaId":"3B0C52D5-1F74-4959-9248-8CCE6309162E"},{"vulnerable":true,"criteria":"cpe:2.3:a:warpgate_project:warpgate:*:*:*:*:*:*:*:*","versionEndExcluding":"0.23.1","matchCriteriaId":"449C9C44-332F-4C2C-A619-33C5025249DB"}]}]}],"references":[{"url":"https://github.com/Eugeny/russh/commit/6c3c80a9b6d60763d6227d60fa8310e57172a4d1","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/Eugeny/russh/releases/tag/v0.60.1","source":"security-advisories@github.com","tags":["Product","Release Notes"]},{"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmg","source":"security-advisories@github.com","tags":["Exploit","Mitigation","Vendor Advisory"]},{"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmg","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":["Exploit","Mitigation","Vendor Advisory"]}]}