{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-40894",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-04-15T16:37:22.766Z",
        "datePublished": "2026-04-23T18:03:28.211Z",
        "dateUpdated": "2026-04-23T19:22:47.268Z"
    },
    "containers": {
        "cna": {
            "title": "OpenTelemetry dotnet: Excessive memory allocation when parsing OpenTelemetry propagation headers",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-789",
                            "lang": "en",
                            "description": "CWE-789: Memory Allocation with Excessive Size Value",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "LOW",
                        "baseScore": 5.3,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-g94r-2vxg-569j",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-g94r-2vxg-569j"
                },
                {
                    "name": "https://github.com/open-telemetry/opentelemetry-dotnet/pull/1048",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/open-telemetry/opentelemetry-dotnet/pull/1048"
                },
                {
                    "name": "https://github.com/open-telemetry/opentelemetry-dotnet/pull/3244",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/open-telemetry/opentelemetry-dotnet/pull/3244"
                },
                {
                    "name": "https://github.com/open-telemetry/opentelemetry-dotnet/pull/3309",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/open-telemetry/opentelemetry-dotnet/pull/3309"
                },
                {
                    "name": "https://github.com/open-telemetry/opentelemetry-dotnet/pull/533",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/open-telemetry/opentelemetry-dotnet/pull/533"
                },
                {
                    "name": "https://github.com/open-telemetry/opentelemetry-dotnet/pull/7061",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/open-telemetry/opentelemetry-dotnet/pull/7061"
                }
            ],
            "affected": [
                {
                    "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"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-04-23T18:03:28.211Z"
            },
            "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."
                }
            ],
            "source": {
                "advisory": "GHSA-g94r-2vxg-569j",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-04-23T19:22:40.530419Z",
                                "id": "CVE-2026-40894",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-04-23T19:22:47.268Z"
                }
            }
        ]
    }
}