{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-73429", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-08-12T14:32:11.796Z", "datePublished": "2026-08-12T20:53:19.558Z", "dateUpdated": "2026-08-12T20:53:19.558Z"}, "containers": {"cna": {"title": "Russh: client wrong-length X25519 `clone_from_slice` panic (pre-auth DoS)", "problemTypes": [{"descriptions": [{"cweId": "CWE-704", "lang": "en", "description": "CWE-704: Incorrect Type Conversion or Cast", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-754", "lang": "en", "description": "CWE-754: Improper Check for Unusual or Exceptional Conditions", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "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:L", "version": "3.1"}}], "references": [{"name": "https://github.com/Eugeny/russh/security/advisories/GHSA-g9hv-x236-4qp3", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/Eugeny/russh/security/advisories/GHSA-g9hv-x236-4qp3"}, {"name": "https://github.com/Eugeny/russh/commit/a7fc1eb5717264e31c3c5f7dd849b73989a08f3d", "tags": ["x_refsource_MISC"], "url": "https://github.com/Eugeny/russh/commit/a7fc1eb5717264e31c3c5f7dd849b73989a08f3d"}, {"name": "https://github.com/Eugeny/russh/releases/tag/v0.62.4", "tags": ["x_refsource_MISC"], "url": "https://github.com/Eugeny/russh/releases/tag/v0.62.4"}], "affected": [{"vendor": "Eugeny", "product": "russh", "versions": [{"version": "< 0.62.4", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-12T20:53:19.558Z"}, "descriptions": [{"lang": "en", "value": "Russh is a Rust SSH client & server library. Prior to 0.62.4, a malicious SSH server can crash a russh client session with a malformed KEX_ECDH_REPLY containing a server ephemeral value that is not 32 bytes long. The client-side Curve25519Kex::compute_shared_secret function in russh/src/kex/curve25519.rs passes the decoded exchange.server_ephemeral value to clone_from_slice without validating its length, causing a deterministic panic before the server host key is verified. The panic terminates the spawned client session task and surfaces as a JoinError, while the embedding process normally remains running. This issue is fixed in version 0.62.4."}], "source": {"advisory": "GHSA-g9hv-x236-4qp3", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "russh", "vendor": "Eugeny", "versions": [{"status": "affected", "version": "< 0.62.4"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Russh is a Rust SSH client & server library. Prior to 0.62.4, a malicious SSH server can crash a russh client session with a malformed KEX_ECDH_REPLY containing a server ephemeral value that is not 32 bytes long. The client-side Curve25519Kex::compute_shared_secret function in russh/src/kex/curve25519.rs passes the decoded exchange.server_ephemeral value to clone_from_slice without validating its length, causing a deterministic panic before the server host key is verified. The panic terminates the spawned client session task and surfaces as a JoinError, while the embedding process normally remains running. This issue is fixed in version 0.62.4."}], "id": "CVE-2026-73429", "lastModified": "2026-08-12T21:17:41.750", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "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:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-08-12T21:17:41.750", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/Eugeny/russh/commit/a7fc1eb5717264e31c3c5f7dd849b73989a08f3d"}, {"source": "security-advisories@github.com", "url": "https://github.com/Eugeny/russh/releases/tag/v0.62.4"}, {"source": "security-advisories@github.com", "url": "https://github.com/Eugeny/russh/security/advisories/GHSA-g9hv-x236-4qp3"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-704"}, {"lang": "en", "value": "CWE-754"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.62.4)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "russh", "source": "cna", "vendor": "Eugeny"}, "product": "russh", "vendor": "eugeny"}], "created": "2026-08-12T23:00:05.002762+00:00", "updated": "2026-08-12T23:00:05.002784+00:00", "vendors": ["eugeny", "eugeny$PRODUCT$russh"]}