{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-128087","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-11-12T21:24:51.131Z","datePublished":"2026-11-13T19:03:26.702Z","dateUpdated":"2026-11-13T21:15:30.367Z"},"containers":{"cna":{"title":"russh kex_done: shared-secret callback runs before server host-key verification","problemTypes":[{"descriptions":[{"cweId":"CWE-696","lang":"en","description":"CWE-696: Incorrect Behavior Order","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-863","lang":"en","description":"CWE-863: Incorrect Authorization","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":3.7,"baseSeverity":"LOW","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/Eugeny/russh/security/advisories/GHSA-9264-jvgf-6w2f","tags":["x_refsource_CONFIRM"],"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-9264-jvgf-6w2f"},{"name":"https://github.com/Eugeny/russh/pull/808","tags":["x_refsource_MISC"],"url":"https://github.com/Eugeny/russh/pull/808"},{"name":"https://github.com/Eugeny/russh/commit/43a46d67a80a7355fcd2fb25e7e00d79aec8184c","tags":["x_refsource_MISC"],"url":"https://github.com/Eugeny/russh/commit/43a46d67a80a7355fcd2fb25e7e00d79aec8184c"},{"name":"https://github.com/Eugeny/russh/releases/tag/v0.65.1","tags":["x_refsource_MISC"],"url":"https://github.com/Eugeny/russh/releases/tag/v0.65.1"}],"affected":[{"vendor":"Eugeny","product":"russh","versions":[{"version":">= 0.55.0, < 0.65.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-11-13T19:03:26.702Z"},"descriptions":[{"lang":"en","value":"russh is a Rust SSH client and server library that includes an SSH agent protocol implementation. From version 0.55.0 until version 0.65.1, the initial key exchange invokes client::Handler::kex_done() with the raw shared secret before check_server_key() accepts the server host key or certificate. A malicious SSH server can therefore trigger application-defined secondary-channel initialization or early data handling even when the server identity is subsequently rejected. Ordinary clients that keep the callback's no-op default or independently defer callback-derived actions until trust is confirmed are not affected. This issue is fixed in version 0.65.1."}],"source":{"advisory":"GHSA-9264-jvgf-6w2f","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-9264-jvgf-6w2f","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-11-13T21:15:11.345733Z","id":"CVE-2026-128087","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"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":"2026-11-13T21:15:30.367Z"}}]}}