OpenTelemetry dotnet: Excessive memory allocation when parsing OpenTelemetry propagation headers

These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.

CVE-2026-40894 · Microsoft / collected KEV context

EUVD-2026-25269

GHSA-g94r-2vxg-569j

cve-program · CVE-2026-40894

• https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-g94r-2vxg-569j
• 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

euvd · EUVD-2026-25269

• https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-g94r-2vxg-569j
• 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

nvd · 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/533
• https://github.com/open-telemetry/opentelemetry-dotnet/pull/7061
• https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-g94r-2vxg-569j

osv · 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

No related operational record is retained in the current change model.