{"id":"CVE-2026-40182","sourceIdentifier":"security-advisories@github.com","published":"2026-04-23T18:16:28.130","lastModified":"2026-06-17T10:44:49.967","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"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."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"open-telemetry","product":"opentelemetry-dotnet","versions":[{"version":">= 1.13.1, < 1.15.2","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"ADJACENT_NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.6,"impactScore":3.6},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":5.9,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":2.2,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-04-23T18:38:48.491134Z","id":"CVE-2026-40182","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-789"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:opentelemetry:opentelemetry:*:*:*:*:*:.net:*:*","versionStartIncluding":"1.13.1","versionEndExcluding":"1.15.2","matchCriteriaId":"5539A01E-6E54-4AE2-8D72-6E5C15C01C61"}]}]}],"references":[{"url":"https://github.com/open-telemetry/opentelemetry-dotnet/pull/6564","source":"security-advisories@github.com","tags":["Issue Tracking","Patch"]},{"url":"https://github.com/open-telemetry/opentelemetry-dotnet/pull/7017","source":"security-advisories@github.com","tags":["Issue Tracking","Patch"]},{"url":"https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-q834-8qmm-v933","source":"security-advisories@github.com","tags":["Vendor Advisory"]},{"url":"https://github.com/open-telemetry/opentelemetry-proto/pull/781","source":"security-advisories@github.com","tags":["Issue Tracking"]}]}