CVE-2026-41483

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{"affected": [{"affectedData": [{"product": "opentelemetry-dotnet-contrib", "vendor": "open-telemetry", "versions": [{"status": "affected", "version": "<= 1.15.0-beta.1"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:opentelemetry:opentelemetry.resources.azure:*:*:*:*:*:.net:*:*", "matchCriteriaId": "CF0426DA-449F-4F42-9C5E-D7FAA3FFC2C2", "versionEndIncluding": "1.15.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "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 ning\u00fan l\u00edmite de tama\u00f1o. Un atacante que controla el endpoint configurado, o que puede interceptar el tr\u00e1fico hacia \u00e9l a trav\u00e9s de un ataque man-in-the-middle, puede devolver un cuerpo de respuesta arbitrariamente grande. Esto causa una asignaci\u00f3n de heap ilimitada en el proceso consumidor, lo que lleva a una alta presi\u00f3n de memoria transitoria, bloqueos de la recolecci\u00f3n de basura o una OutOfMemoryException que termina el proceso. Como soluci\u00f3n 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 est\u00e1 solucionado en la versi\u00f3n 1.15.1-beta.1, que transmite las respuestas en lugar de almacenarlas completamente en la memoria e ignora las respuestas de m\u00e1s de 4 MiB."}], "id": "CVE-2026-41483", "lastModified": "2026-10-26T19:10:00.163", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-41483", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-05-07T13:51:32.287467Z", "version": "2.0.3"}}]}, "published": "2026-05-06T22:16:25.920", "references": [{"source": "security-advisories@github.com", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/4121"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://github.com/open-telemetry/opentelemetry-dotnet-contrib/security/advisories/GHSA-vc24-j8c5-2vw4"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-770"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

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