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OpenTelemetry dotnet: Excessive memory allocation when parsing OpenTelemetry propagation headers

Collected exploitation and prediction evidence

Risk source coverage

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

CVE-2026-40894

Exact risk observation. Current source statements above are a separate evidence layer. Latest risk evidence.

No KEV entry is attached to this observation; this is not evidence that exploitation is absent.

FIRST EPSS: 0.46 % · percentile 39.71 % · scored 30 Oct 2026.

Observed 31 Oct 2026 01:52:30 UTC · Complete immutable risk JSON

Immutable source observations

7 recorded revisions

Each citation identifies one complete source statement. Source modification dates and the time this installation observed them are distinct. Latest history includes records historically associated by source identifiers; a removed alias is not a current equivalence claim. Exact citations show that source record's own earlier observations. Failed reads and unchanged polls do not rewrite history.

1 Nov 2026 07:05:05 UTC

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 Open…

euvd · EUVD-2026-25269 · Published

30 Oct 2026 06:49:10 UTC

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 Open…

euvd · EUVD-2026-25269 · Published

28 Oct 2026 05:02:54 UTC

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 Open…

euvd · EUVD-2026-25269 · Published

27 Oct 2026 10:10:07 UTC

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 Open…

nvd · CVE-2026-40894 · Published

25 Oct 2026 09:17:30 UTC

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 Open…

nvd · CVE-2026-40894 · Published

23 Oct 2026 16:01:25 UTC

OpenTelemetry dotnet: Excessive memory allocation when parsing OpenTelemetry propagation headers

osv · GHSA-g94r-2vxg-569j · Published

23 Oct 2026 15:48:27 UTC

OpenTelemetry dotnet: Excessive memory allocation when parsing OpenTelemetry propagation headers

cve-program · CVE-2026-40894 · Published

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 1 Nov 19:21 UTC · 275 of 275 readable · 272 fully read · documentation 469/469 current