{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-42189","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-04-25T01:53:21.583Z","datePublished":"2026-05-08T19:49:51.179Z","dateUpdated":"2026-05-11T14:23:49.308Z"},"containers":{"cna":{"title":"Russh: Pre-auth DoS via unbounded allocation in keyboard-interactive auth","problemTypes":[{"descriptions":[{"cweId":"CWE-770","lang":"en","description":"CWE-770: Allocation of Resources Without Limits or Throttling","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-789","lang":"en","description":"CWE-789: Memory Allocation with Excessive Size Value","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"references":[{"name":"https://github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmg","tags":["x_refsource_CONFIRM"],"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmg"},{"name":"https://github.com/Eugeny/russh/commit/6c3c80a9b6d60763d6227d60fa8310e57172a4d1","tags":["x_refsource_MISC"],"url":"https://github.com/Eugeny/russh/commit/6c3c80a9b6d60763d6227d60fa8310e57172a4d1"},{"name":"https://github.com/Eugeny/russh/releases/tag/v0.60.1","tags":["x_refsource_MISC"],"url":"https://github.com/Eugeny/russh/releases/tag/v0.60.1"}],"affected":[{"vendor":"Eugeny","product":"russh","versions":[{"version":"< 0.60.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-05-08T19:49:51.179Z"},"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."}],"source":{"advisory":"GHSA-f5v4-2wr6-hqmg","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmg","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-11T14:23:22.063007Z","id":"CVE-2026-42189","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-05-11T14:23:49.308Z"}}]}}