{"id":"CVE-2026-42348","revision":"acd356c18a89494ab76c7f9e4a6ff57e","records":[{"revision":"acd356c18a89494ab76c7f9e4a6ff57e","observedAt":"2026-10-25T10:17:10.603+00:00","statement":{"source":"nvd","id":"CVE-2026-42348","aliases":[],"title":"OpenTelemetry.OpAmp.Client is the OpAMP client for OpenTelemetry .NET. Prior to 0.2.0-alpha.1, when receiving responses from the OpAMP server over HTTP, the OpAMP client allocates an unbounded buffer to read all bytes from the server, with …","description":"OpenTelemetry.OpAmp.Client is the OpAMP client for OpenTelemetry .NET. Prior to 0.2.0-alpha.1, when receiving responses from the OpAMP server over HTTP, the OpAMP client allocates an unbounded buffer to read all bytes from the server, with no upper-bound on the number of bytes consumed. This could cause memory exhaustion in the consuming application if the configured OpAMP server is attacker-controlled (or a network attacker can MitM the connection) and an extremely large body is returned in the response. This vulnerability is fixed in 0.2.0-alpha.1.","state":0,"publishedAt":"2026-05-12T18:17:24.7+00:00","modifiedAt":"2026-06-17T10:47:43.323+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","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"},{"system":"CVSS 3.1 · nvd@nist.gov · Primary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/4116","https://github.com/open-telemetry/opentelemetry-dotnet-contrib/security/advisories/GHSA-w2jh-77fq-7gp8"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-42348","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-789"],"productCriteria":["cpe:2.3:a:opentelemetry:opentelemetry.opamp.client:*:*:*:*:*:.net:*:*"],"sourceDates":{"published":"2026-05-12T18:17:24.700","lastModified":"2026-06-17T10:47:43.323"},"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-2026-42348","identifiers":["CVE-2026-42348"]},"retained":false,"historicalAffected":[]}],"coverage":[]}