{"id":"CVE-2026-40182","summary":"OpenTelemetry dotnet: OTLP exporter reads unbounded HTTP response bodies","details":"OpenTelemetry dotnet is a dotnet telemetry framework. From 1.13.1 to before 1.15.2, When exporting telemetry to a back-end/collector over gRPC or HTTP using OpenTelemetry Protocol format (OTLP), 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. This 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. This vulnerability is fixed in 1.15.2.","aliases":["GHSA-q834-8qmm-v933"],"modified":"2026-08-29T11:45:52.279917991Z","published":"2026-04-23T17:51:34.961Z","related":["CGA-3cx9-gq56-cp35"],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-789"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40182.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40182.json"},{"type":"ADVISORY","url":"https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-q834-8qmm-v933"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40182"},{"type":"FIX","url":"https://github.com/open-telemetry/opentelemetry-dotnet/pull/6564"},{"type":"FIX","url":"https://github.com/open-telemetry/opentelemetry-dotnet/pull/7017"},{"type":"FIX","url":"https://github.com/open-telemetry/opentelemetry-proto/pull/781"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/open-telemetry/opentelemetry-dotnet","events":[{"introduced":"640cf63628567b76b348b26988920dbc0b5c1662"},{"fixed":"4b588c1cacd8ae7eade8b4c5bccda4acfb7c35e5"}],"database_specific":{"cpe":"cpe:2.3:a:opentelemetry:opentelemetry:*:*:*:*:*:.net:*:*","extracted_events":[{"introduced":"1.13.1"},{"fixed":"1.15.2"}],"source":["AFFECTED_FIELD","CPE_RANGE"]}},{"type":"GIT","repo":"https://github.com/open-telemetry/opentelemetry-js","events":[{"introduced":"0"},{"fixed":"48fb15862e801b742059a3e39dbcc8ef4c10b2e2"}],"database_specific":{"cpe":"cpe:2.3:a:opentelemetry:opentelemetry:*:*:*:*:*:.net:*:*","extracted_events":[{"introduced":"1.13.1"},{"fixed":"1.15.2"}],"source":"CPE_RANGE"}}],"versions":["coreunstable-1.15.1-beta.1","core-1.15.1","coreunstable-1.15.0-beta.1","core-1.15.0","coreunstable-1.14.0-beta.1","core-1.14.0","core-1.14.0-rc.1","coreunstable-1.13.1-beta.1","core-1.13.1","v1.15.1","experimental/v0.41.1","v1.15.0","experimental/v0.41.0","v1.14.0","experimental/v0.40.0","experimental/v0.39.1","v1.13.0","experimental/v0.39.0","v1.12.0","experimental/v0.38.0","v1.11.0","experimental/v0.37.0","v1.10.0","experimental/v0.36.0","api/v1.4.1","v1.9.1","experimental/v0.35.1","v1.9.0","experimental/v0.35.0","api/v1.4.0","v1.8.0","experimental/v0.34.0","api/v1.3.0","v1.7.0","experimental/v0.33.0","v1.6.0","experimental/v0.32.0","v1.5.0","experimental/v0.31.0","v1.4.0","experimental/v0.30.0","experimental/v0.29.1","v1.3.0","experimental/v0.29.0","v1.2.0","v0.28.0","v1.1.1","v1.1.0","stable/v1.0.1","experimental/v0.27.0","stable/v1.0.0","v0.26.0","v0.25.0","v0.24.0","v0.23.0","v0.22.0","v0.21.0","v0.20.0","v0.19.0","v0.18.2","v0.18.1","v0.18.0","v0.17.0","v0.16.0","v0.15.0","v0.14.0","v0.13.0","v0.12.0","v0.11.0","0.11.0","v0.10.3-canary.0","v0.10.2","v0.10.1","v0.10.0","v0.9.0","v0.8.3","v0.8.2","v0.8.1","v0.8.0","v0.7.0","v0.6.1","v0.6.0","v0.5.2","v0.5.1","v0.5.0","v0.4.0","v0.3.3","v0.3.2","v0.3.1","v0.3.0","v0.2.0","v0.1.1","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40182.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}