{"action":"Upgrade OpenTelemetry.Extensions.Propagators to 1.15.3 or later.","affected":[{"fixed":"1.15.3","introduced":"1.3.1"}],"component":"OpenTelemetry.Extensions.Propagators","cve_ids":["CVE-2026-40894"],"ecosystem":"NuGet","epss":0.00458,"exploited":false,"fixed_versions":["1.15.3"],"ghsa_id":"GHSA-g94r-2vxg-569j","id":"tcs_01M5N8P0M0JQM1VBVSN26KTV9J","modified_at":"2026-09-10T03:50:44.580018840Z","published_at":"2026-04-23T21:43:53Z","references":["https://osv.dev/vulnerability/GHSA-g94r-2vxg-569j","https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-g94r-2vxg-569j","https://nvd.nist.gov/vuln/detail/CVE-2026-40894","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/3533","https://github.com/open-telemetry/opentelemetry-dotnet/pull/533","https://github.com/open-telemetry/opentelemetry-dotnet/pull/7061","https://github.com/open-telemetry/opentelemetry-dotnet","https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/core-1.15.3"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"GHSA-g94r-2vxg-569j#NuGet/OpenTelemetry.Extensions.Propagators","url":"https://osv.dev/vulnerability/GHSA-g94r-2vxg-569j"}],"summary":"OpenTelemetry dotnet: Excessive memory allocation when parsing OpenTelemetry propagation headers"}