CVE-2026-41483

{
  "id": "CVE-2026-41483",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-06T22:16:25.920",
  "lastModified": "2026-10-26T19:10:00.163",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "OpenTelemetry.Resources.Azure is the .NET resource detector for Azure environments. In versions 1.15.0-beta.1 and earlier, the AzureVmMetaDataRequestor class makes HTTP requests to the Azure VM instance metadata service and reads the response body into memory without any size limit. An attacker who controls the configured endpoint, or who can intercept traffic to it via a man-in-the-middle attack, can return an arbitrarily large response body. This causes unbounded heap allocation in the consuming process, leading to high transient memory pressure, garbage-collection stalls, or an OutOfMemoryException that terminates the process. As a workaround, disable the Azure VM resource detector or use network-level controls such as firewall rules, mTLS, or a service mesh to prevent man-in-the-middle attacks on the Azure VM instance metadata endpoint. This issue is fixed in version 1.15.1-beta.1, which streams responses rather than buffering them entirely in memory and ignores responses larger than 4 MiB."
    },
    {
      "lang": "es",
      "value": "OpenTelemetry.Resources.Azure es el detector de recursos .NET para entornos Azure. En las versiones 1.15.0-beta.1 y anteriores, la clase AzureVmMetaDataRequestor realiza solicitudes HTTP al servicio de metadatos de instancia de VM de Azure y lee el cuerpo de la respuesta en la memoria sin ningún límite de tamaño. Un atacante que controla el endpoint configurado, o que puede interceptar el tráfico hacia él a través de un ataque man-in-the-middle, puede devolver un cuerpo de respuesta arbitrariamente grande. Esto causa una asignación de heap ilimitada en el proceso consumidor, lo que lleva a una alta presión de memoria transitoria, bloqueos de la recolección de basura o una OutOfMemoryException que termina el proceso. Como solución alternativa, deshabilite el detector de recursos de VM de Azure o use controles a nivel de red como reglas de cortafuegos, mTLS o una malla de servicios para prevenir ataques man-in-the-middle en el endpoint de metadatos de instancia de VM de Azure. Este problema está solucionado en la versión 1.15.1-beta.1, que transmite las respuestas en lugar de almacenarlas completamente en la memoria e ignora las respuestas de más de 4 MiB."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "open-telemetry",
          "product": "opentelemetry-dotnet-contrib",
          "versions": [
            {
              "version": "<= 1.15.0-beta.1",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 3.6
      },
      {
        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-05-07T13:51:32.287467Z",
          "id": "CVE-2026-41483",
          "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-770"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:opentelemetry:opentelemetry.resources.azure:*:*:*:*:*:.net:*:*",
              "versionEndIncluding": "1.15.0",
              "matchCriteriaId": "CF0426DA-449F-4F42-9C5E-D7FAA3FFC2C2"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/4121",
      "source": "[email protected]",
      "tags": [
        "Issue Tracking",
        "Patch"
      ]
    },
    {
      "url": "https://github.com/open-telemetry/opentelemetry-dotnet-contrib/security/advisories/GHSA-vc24-j8c5-2vw4",
      "source": "[email protected]",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ]
    }
  ]
}