{"id":"GHSA-55m9-299j-53c7","revision":null,"records":[{"revision":"2ae387966c8e48819c656150348bbe98","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-41484","aliases":[],"title":"OpenTelemetry.Exporter.OneCollector vulnerable to denial of service via unbounded HTTP error response body","description":"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.","state":0,"publishedAt":"2026-05-06T21:00:07.43+00:00","modifiedAt":"2026-05-07T12:43:25.988+00:00","affected":[{"ecosystem":"Vendor product","name":"opentelemetry-dotnet-contrib","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"open-telemetry\",\n                    \"product\": \"opentelemetry-dotnet-contrib\",\n                    \"versions\": [\n                        {\n                            \"version\": \"<= 1.15.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","score":5.3,"severity":"MEDIUM"}],"references":["https://github.com/open-telemetry/opentelemetry-dotnet-contrib/security/advisories/GHSA-55m9-299j-53c7","https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/4117"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-41484","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-41484","identifiers":["CVE-2026-41484"]},"retained":false,"historicalAffected":[]},{"revision":"b5c8407581e949a3b9fc56dc1e6b586b","observedAt":"2026-11-07T09:30:53.425+00:00","statement":{"source":"euvd","id":"EUVD-2026-28228","aliases":["CVE-2026-41484","GHSA-55m9-299j-53c7"],"title":"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 …","description":"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.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","score":5.3,"severity":null}],"references":["https://github.com/open-telemetry/opentelemetry-dotnet-contrib/security/advisories/GHSA-55m9-299j-53c7","https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/4117"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-28228","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"May 6, 2026, 9:00:07 PM","dateUpdated":"May 7, 2026, 12:43:25 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. 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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.","state":0,"publishedAt":"2026-05-06T22:16:26.05+00:00","modifiedAt":"2026-10-26T19:10:00.163+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","score":5.3,"severity":"MEDIUM"},{"system":"CVSS 3.1 · nvd@nist.gov · Primary","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","score":5.9,"severity":"MEDIUM"}],"references":["https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/4117","https://github.com/open-telemetry/opentelemetry-dotnet-contrib/security/advisories/GHSA-55m9-299j-53c7"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-41484","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-770"],"productCriteria":["cpe:2.3:a:opentelemetry:opentelemetry.exporter.onecollector:*:*:*:*:*:.net:*:*"],"sourceDates":{"published":"2026-05-06T22:16:26.050","lastModified":"2026-10-26T19:10:00.163"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-41484","identifiers":["CVE-2026-41484"]},"retained":false,"historicalAffected":[]},{"revision":"3c27330686ac45bfbc3155dd205532f3","observedAt":"2026-10-23T16:01:25.029+00:00","statement":{"source":"osv","id":"GHSA-55m9-299j-53c7","aliases":["CVE-2026-41484"],"title":"OneCollector exporter reads unbounded HTTP response bodies","description":"### Summary\n\nWhen exporting telemetry to a back-end/collector over HTTP using the OpenTelemetry.Exporter.OneCollector exporter, if the request results in a unsuccessful request (i.e. HTTP 4xx or 5xx), the response is read into memory with no upper-bound on the number of bytes consumed.\n\nThis could cause memory exhaustion in the consuming application if the configured back-end/collector endpoint is attacker-controlled (or a network attacker can MitM the connection) and an extremely large body is returned by the response.\n\n### Details\n\nThe [`HttpJsonPostTransport`](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/blob/171c6b81f88831641b56b470e6f92862e605013d/src/OpenTelemetry.Exporter.OneCollector/Internal/Transports/HttpJsonPostTransport.cs) class reads the response body when a non-200 HTTP status code is received when exporting telemetry to aid debugging by operators so that the error response is included in the logs emitted by the exporter.\n\nAn attacker who controls the configured endpoint, or who can intercept traffic to them (MiTM), 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.\n\n### Impact\n\nIf an application using the OneCollector exporter is configured to use a back-end/collector endpoint that is attacker-controlled (or a network attacker can MitM the connection) and an extremely large body is returned by the response the application could have its memory exhausted and create a denial-of-service condition.\n\n### Mitigation\n\nThe application's configured back-end/collector endpoint needs to behave maliciously. If the collector/back-end is a well-behaved implementation response bodies should not be excessively large if a request error occurs.\n\n### Workarounds\n\nUse network-level controls (firewall rules, mTLS, service mesh) to prevent Man-in-the-Middle (MitM) attacks on the configured back-end/collector endpoint.\n\n### Remediation\n\n[#4117](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/4117) updates the OneCollector exporter to limit the number of bytes read from the response body in an error condition to 4MiB.\n\n### Resources\n\n- [#4117](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/4117)","state":0,"publishedAt":"2026-04-29T20:17:57+00:00","modifiedAt":"2026-05-08T19:48:51.643634+00:00","affected":[{"ecosystem":"NuGet","name":"OpenTelemetry.Exporter.OneCollector","ranges":[{"type":"ECOSYSTEM","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.15.1"}]}],"versions":["1.10.0","1.11.0","1.11.1","1.13.0","1.14.0","1.15.0","1.5.1","1.6.0","1.8.0","1.9.0","1.9.1","1.9.2","1.9.3"],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/open-telemetry/opentelemetry-dotnet-contrib/security/advisories/GHSA-55m9-299j-53c7","https://nvd.nist.gov/vuln/detail/CVE-2026-41484","https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/4117","https://github.com/open-telemetry/opentelemetry-dotnet-contrib/commit/77dc5d14fcdf6c6b3aeba5f8bba5dfded90495c9","https://github.com/open-telemetry/opentelemetry-dotnet-contrib"],"sourceUrl":"https://github.com/advisories/GHSA-55m9-299j-53c7","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-55m9-299j-53c7","identifiers":["GHSA-55m9-299j-53c7","CVE-2026-41484"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-07T16:07:52.6079466+00:00","complete":true,"records":1769,"lastAttemptAt":"2026-11-07T16:07:52.6079466+00:00","lastSuccessAt":"2026-11-07T16:07:52.8396759+00:00","error":null,"lastVerifiedAt":"2026-11-07T16:07:52.8396778+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-bb5c9d5a08063ef076042e33dd72a7d0ffa4c4487efdcf3106e29ba55ec2ad57-c173d89a3f1a0bdb31cd68e866be332a5016302f586ede89a35ec193ac99504a","complete":true,"records":420933,"lastAttemptAt":"2026-11-07T16:07:52.127477+00:00","lastSuccessAt":"2026-11-07T16:07:52.0557652+00:00","error":null,"lastVerifiedAt":"2026-11-07T16:07:52.127477+00:00","snapshotPublishedAt":"2026-11-07T15:22:48+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-bee3dfbd77fe4043986590b0e0b76259","complete":true,"records":13633,"lastAttemptAt":"2026-11-07T16:18:44.6437051+00:00","lastSuccessAt":"2026-11-07T16:18:44.639+00:00","error":null,"lastVerifiedAt":"2026-11-07T16:18:44.639+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13685,"expectedIdentifiers":13685,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-07T16:07:52.6079466+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-07T16:07:52.6079466+00:00","lastSuccessAt":"2026-11-07T16:07:58.5710341+00:00","error":null,"lastVerifiedAt":"2026-11-07T16:07:58.5710358+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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