CVE-2026-41484

{
  "id": "CVE-2026-41484",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-06T22:16:26.050",
  "lastModified": "2026-10-26T19:10:00.163",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "OpenTelemetry.Exporter.OneCollector is a .NET exporter that sends telemetry to a OneCollector back-end over HTTP. In versions 1.15.0 and earlier, when a request to the configured back-end or collector results in an unsuccessful HTTP 4xx or 5xx response, the HttpJsonPostTransport class reads the entire response body into memory with no upper bound on the number of bytes consumed in order to include the error response in operator logs.\n\nAn 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, use network-level controls such as firewall rules, mTLS, or a service mesh to prevent man-in-the-middle attacks on the configured back-end or collector endpoint. This issue is fixed in version 1.15.1, which limits the number of bytes read from the response body in an error condition to 4 MiB."
    },
    {
      "lang": "es",
      "value": "OpenTelemetry.Exporter.OneCollector es un exportador .NET que envía telemetría a un back-end de OneCollector a través de HTTP. En las versiones 1.15.0 y anteriores, cuando una solicitud al back-end o colector configurado resulta en una respuesta HTTP 4xx o 5xx no exitosa, la clase HttpJsonPostTransport lee todo el cuerpo de la respuesta en la memoria sin un límite superior en el número de bytes consumidos para incluir la respuesta de error en los registros del operador.\n\nUn atacante que controla el punto final 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 memoria dinámica 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, utilice controles a nivel de red como reglas de cortafuegos, mTLS o una malla de servicios para prevenir ataques man-in-the-middle en el back-end o punto final del colector configurado. Este problema se corrige en la versión 1.15.1, que limita el número de bytes leídos del cuerpo de la respuesta en una condición de error a 4 MiB."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "open-telemetry",
          "product": "opentelemetry-dotnet-contrib",
          "versions": [
            {
              "version": "<= 1.15.0",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "ADJACENT_NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.6,
        "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": "2026-05-07T12:42:42.854130Z",
          "id": "CVE-2026-41484",
          "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.exporter.onecollector:*:*:*:*:*:.net:*:*",
              "versionEndIncluding": "1.15.0",
              "matchCriteriaId": "59E3B085-C186-49A0-9175-DED866C0F682"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/4117",
      "source": "[email protected]",
      "tags": [
        "Issue Tracking",
        "Patch"
      ]
    },
    {
      "url": "https://github.com/open-telemetry/opentelemetry-dotnet-contrib/security/advisories/GHSA-55m9-299j-53c7",
      "source": "[email protected]",
      "tags": [
        "Mitigation",
        "Patch",
        "Vendor Advisory"
      ]
    }
  ]
}