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CVE-2026-59846

Estado: ModificadaBaja (3.9)—

A flaw was found in libssh. A malicious username expanded through %r in ProxyCommand handling can inject shell metacharacters, exposing environment variables and causing unintended shell behavior.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (3)

Libssh — LibsshRedhat — Enterprise LinuxRedhat — Hardened Images

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2026-59846",
  "cveTags": [],
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          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-07-22T14:03:12.267428Z"
        }
      }
    ],
    "cvssMetricV31": [
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        "source": "secalert@redhat.com",
        "cvssData": {
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          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
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        "exploitabilityScore": 1.3
      }
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          "defaultStatus": "affected"
        },
        {
          "cpes": [
            "cpe:/a:redhat:hummingbird:1"
          ],
          "vendor": "Red Hat",
          "product": "Red Hat Hardened Images",
          "versions": [
            {
              "status": "unaffected",
              "version": "0.12.1-4.hum1",
              "lessThan": "*",
              "versionType": "rpm"
            }
          ],
          "packageName": "libssh-main",
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "defaultStatus": "affected"
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  ],
  "published": "2026-07-21T13:17:18.143",
  "references": [
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      "tags": [
        "Vendor Advisory"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:55855",
      "source": "secalert@redhat.com"
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      "source": "secalert@redhat.com"
    },
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      "source": "secalert@redhat.com"
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      "tags": [
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      "tags": [
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        "Vendor Advisory"
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      "source": "secalert@redhat.com"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
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      "source": "secalert@redhat.com",
      "description": [
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          "lang": "en",
          "value": "CWE-78"
        }
      ]
    },
    {
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      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
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          "value": "CWE-77"
        }
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in libssh. A malicious username expanded through %r in ProxyCommand handling can inject shell metacharacters, exposing environment variables and causing unintended shell behavior."
    }
  ],
  "lastModified": "2026-09-01T21:18:34.740",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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