CVE-2026-58494

{
  "id": "CVE-2026-58494",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-08T21:16:54.000",
  "lastModified": "2026-10-25T17:10:00.197",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Wasmtime is a runtime for WebAssembly. Prior to 24.0.11, 36.0.12, 45.0.3, and 46.0.1, wasmtime-wasi hard-link creation and renaming check directory permissions but not matching FilePerms on source and destination preopens, allowing a WASI guest with a read-only source file capability to overwrite host files exposed as FilePerms::READ through wasip1, wasip2, or wasip3 filesystem interfaces. This issue is fixed in versions 24.0.11, 36.0.12, 45.0.3, and 46.0.1."
    },
    {
      "lang": "es",
      "value": "Wasmtime es un tiempo de ejecución para WebAssembly. Antes de las versiones 24.0.11, 36.0.12, 45.0.3 y 46.0.1, la creación y el renombramiento de enlaces duros de wasmtime-wasi comprueban los permisos de directorio, pero no los FilePerms coincidentes en las preaperturas de origen y destino, lo que permite a un invitado WASI con una capacidad de archivo de origen de solo lectura sobrescribir archivos del host expuestos como FilePerms::READ a través de las interfaces del sistema de archivos wasip1, wasip2 o wasip3. Este problema está solucionado en las versiones 24.0.11, 36.0.12, 45.0.3 y 46.0.1."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "bytecodealliance",
          "product": "wasmtime",
          "versions": [
            {
              "version": "< 24.0.11",
              "status": "affected"
            },
            {
              "version": ">= 25.0.0, < 36.0.12",
              "status": "affected"
            },
            {
              "version": ">= 37.0.0, < 45.0.3",
              "status": "affected"
            },
            {
              "version": ">= 46.0.0, < 46.0.1",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.0,
        "impactScore": 4.0
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-09T13:28:46.718754Z",
          "id": "CVE-2026-58494",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-281"
        },
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/bytecodealliance/wasmtime/commit/5ddfd5f1ef28f2041fa07d237ad0336e167b0e0c",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/bytecodealliance/wasmtime/commit/7db94cdcf0c79cb3dfde884b534b653f2dd83367",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/bytecodealliance/wasmtime/commit/8a250aac0962ca1364b5f16525720e9d0b39edcd",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/bytecodealliance/wasmtime/commit/d3ceb56ec35f39e02496eeb4e2d9c7f4fb964d9e",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/bytecodealliance/wasmtime/releases/tag/v24.0.11",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/bytecodealliance/wasmtime/releases/tag/v36.0.12",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/bytecodealliance/wasmtime/releases/tag/v45.0.3",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/bytecodealliance/wasmtime/releases/tag/v46.0.1",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-4ch3-9j33-3pmj",
      "source": "[email protected]"
    }
  ]
}