FKIE_CVE-2026-42189

Vulnerability from fkie_nvd - Published: 2026-05-08 20:16 - Updated: 2026-05-14 18:07
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
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.
References
security-advisories@github.comhttps://github.com/Eugeny/russh/commit/6c3c80a9b6d60763d6227d60fa8310e57172a4d1Patch
security-advisories@github.comhttps://github.com/Eugeny/russh/releases/tag/v0.60.1Product, Release Notes
security-advisories@github.comhttps://github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmgExploit, Mitigation, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmgExploit, Mitigation, Vendor Advisory
Impacted products
Vendor Product Version
russh_project russh *
warpgate_project warpgate *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:russh_project:russh:*:*:*:*:*:rust:*:*",
              "matchCriteriaId": "3B0C52D5-1F74-4959-9248-8CCE6309162E",
              "versionEndExcluding": "0.60.1",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "449C9C44-332F-4C2C-A619-33C5025249DB",
              "versionEndExcluding": "0.23.1",
              "vulnerable": true
            }
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          "negate": false,
          "operator": "OR"
        }
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Russh is a Rust SSH client \u0026 server library. Prior to version 0.60.1, a pre-authentication denial-of-service vulnerability exists in the server\u0027s 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."
    }
  ],
  "id": "CVE-2026-42189",
  "lastModified": "2026-05-14T18:07:22.943",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "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"
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        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-05-08T20:16:31.443",
  "references": [
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      "source": "security-advisories@github.com",
      "tags": [
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      "tags": [
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      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
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    }
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  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-770"
        },
        {
          "lang": "en",
          "value": "CWE-789"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}


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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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