{"cve":"CVE-2026-40894","nvd":{"published":"2026-04-23T19:17:28.810","modified":"2026-10-26T22:10:00.163","status":"Analyzed","description":"OpenTelemetry dotnet is a dotnet telemetry framework. In OpenTelemetry.Api 0.5.0-beta.2 to 1.15.2 and OpenTelemetry.Extensions.Propagators 1.3.1 to 1.15.2, The implementation details of the baggage, B3 and Jaeger processing code in the OpenTelemetry.Api and OpenTelemetry.Extensions.Propagators NuGet packages can allocate excessive memory when parsing which could create a potential denial of service (DoS) in the consuming application. This vulnerability is fixed in 1.15.3.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":5.3},"cwes":["CWE-789"],"references":["https://github.com/open-telemetry/opentelemetry-dotnet/pull/1048","https://github.com/open-telemetry/opentelemetry-dotnet/pull/3244","https://github.com/open-telemetry/opentelemetry-dotnet/pull/3309","https://github.com/open-telemetry/opentelemetry-dotnet/pull/533","https://github.com/open-telemetry/opentelemetry-dotnet/pull/7061"],"products":["opentelemetry:opentelemetry","opentelemetry:opentelemetry.api","opentelemetry:opentelemetry.extensions.propagators"],"source":"nvd","synced_at":"2026-10-26T22:26:44.656832877+00:00"},"epss":{"cve":"CVE-2026-40894","score":0.00458,"percentile":0.39451,"date":"2026-10-26"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}