CVE-2026-40894

{
  "id": "CVE-2026-40894",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-23T19:17:28.810",
  "lastModified": "2026-10-26T22:10:00.163",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "OpenTelemetry dotnet is a dotnet telemetry framework. In OpenTelemetry.Api 0.5.0-beta.2 to 1.15.2 and OpenTelemetry.Extensions.Propagators 1.3.1 to 1.15.2, The implementation details of the baggage, B3 and Jaeger processing code in the OpenTelemetry.Api and OpenTelemetry.Extensions.Propagators NuGet packages can allocate excessive memory when parsing which could create a potential denial of service (DoS) in the consuming application. This vulnerability is fixed in 1.15.3."
    },
    {
      "lang": "es",
      "value": "OpenTelemetry dotnet es un framework de telemetría dotnet. En OpenTelemetry.Api 0.5.0-beta.2 a 1.15.2 y OpenTelemetry.Extensions.Propagators 1.3.1 a 1.15.2, los detalles de implementación del código de procesamiento de baggage, B3 y Jaeger en los paquetes NuGet OpenTelemetry.Api y OpenTelemetry.Extensions.Propagators pueden asignar memoria excesiva al analizar, lo que podría crear una potencial denegación de servicio (DoS) en la aplicación consumidora. Esta vulnerabilidad está corregida en 1.15.3."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "open-telemetry",
          "product": "opentelemetry-dotnet",
          "versions": [
            {
              "version": ">= 0.5.0-beta.2, < 1.15.3",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "open-telemetry",
          "product": "OpenTelemetry.Api",
          "versions": [
            {
              "version": ">= 0.5.0-beta.2, < 1.15.3",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "open-telemetry",
          "product": "OpenTelemetry.Extensions.Propagators",
          "versions": [
            {
              "version": ">= 1.3.1, < 1.15.3",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-23T19:22:40.530419Z",
          "id": "CVE-2026-40894",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-789"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:opentelemetry:opentelemetry:*:*:*:*:*:.net:*:*",
              "versionStartIncluding": "0.5.0",
              "versionEndExcluding": "1.15.3",
              "matchCriteriaId": "7CF8EB09-F7C5-49FA-BE45-15C9D6ACAE68"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:opentelemetry:opentelemetry.api:*:*:*:*:*:.net:*:*",
              "versionStartIncluding": "0.5.0",
              "versionEndExcluding": "1.15.3",
              "matchCriteriaId": "F4494846-0F47-4868-8315-76F82BA431CA"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:opentelemetry:opentelemetry.extensions.propagators:*:*:*:*:*:*:*:*",
              "versionStartExcluding": "1.3.0",
              "versionEndExcluding": "1.15.3",
              "matchCriteriaId": "FD34268F-5D62-4ACF-9E83-22DA39B5B7F3"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/open-telemetry/opentelemetry-dotnet/pull/1048",
      "source": "[email protected]",
      "tags": [
        "Issue Tracking",
        "Patch"
      ]
    },
    {
      "url": "https://github.com/open-telemetry/opentelemetry-dotnet/pull/3244",
      "source": "[email protected]",
      "tags": [
        "Issue Tracking",
        "Patch"
      ]
    },
    {
      "url": "https://github.com/open-telemetry/opentelemetry-dotnet/pull/3309",
      "source": "[email protected]",
      "tags": [
        "Issue Tracking",
        "Patch"
      ]
    },
    {
      "url": "https://github.com/open-telemetry/opentelemetry-dotnet/pull/533",
      "source": "[email protected]",
      "tags": [
        "Issue Tracking",
        "Patch"
      ]
    },
    {
      "url": "https://github.com/open-telemetry/opentelemetry-dotnet/pull/7061",
      "source": "[email protected]",
      "tags": [
        "Issue Tracking",
        "Patch"
      ]
    },
    {
      "url": "https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-g94r-2vxg-569j",
      "source": "[email protected]",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ]
    }
  ]
}