{"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":"2026-05-28T03:52:53.829843412Z","published":"2026-04-23T17:51:34.961Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40182.json","cwe_ids":["CWE-789"],"cna_assigner":"GitHub_M"},"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"}]}],"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"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-40182.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}