FKIE_CVE-2026-48107

Vulnerability from fkie_nvd - Published: 2026-06-10 22:17 - Updated: 2026-07-23 09:10
Severity
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Summary
Russh is a Rust SSH client & server library. From version 0.37.0 to before version 0.61.0, in the russh client keyboard-interactive authentication path, a malicious SSH server could send a USERAUTH_INFO_REQUEST with an attacker-controlled prompt count, and the client would use that raw count directly in Vec::with_capacity(...) before validating that enough prompt data was actually present in the packet. This issue has been patched in version 0.61.0.
References
security-advisories@github.comhttps://github.com/Eugeny/russh/security/advisories/GHSA-g9g7-5cgw-6v28
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "russh",
          "vendor": "Eugeny",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 0.37.0, \u003c 0.61.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Russh is a Rust SSH client \u0026 server library. From version 0.37.0 to before version 0.61.0, in the russh client keyboard-interactive authentication path, a malicious SSH server could send a USERAUTH_INFO_REQUEST with an attacker-controlled prompt count, and the client would use that raw count directly in Vec::with_capacity(...) before validating that enough prompt data was actually present in the packet. This issue has been patched in version 0.61.0."
    },
    {
      "lang": "es",
      "value": "Russh es una biblioteca SSH de cliente y servidor de Rust. Desde la versi\u00f3n 0.37.0 hasta antes de la versi\u00f3n 0.61.0, en la ruta de autenticaci\u00f3n interactiva por teclado del cliente russh, un servidor SSH malicioso podr\u00eda enviar un USERAUTH_INFO_REQUEST con un recuento de solicitudes controlado por el atacante, y el cliente usar\u00eda ese recuento sin procesar directamente en Vec::with_capacity(...) antes de validar que suficientes datos de solicitud estuvieran realmente presentes en el paquete. Este problema ha sido parcheado en la versi\u00f3n 0.61.0."
    }
  ],
  "id": "CVE-2026-48107",
  "lastModified": "2026-07-23T09:10:00.113",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-48107",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-11T13:04:34.342241Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-10T22:17:00.983",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/Eugeny/russh/security/advisories/GHSA-g9g7-5cgw-6v28"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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