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OpenAdvisories
Medium · 5.9 CVE-2026-41078 EUVD-2026-25270GHSA-38h3-2333-qx47

OpenTelemetry dotnet: Potential memory exhaustion via unbounded pooled-list sizing in Jaeger exporter conversion path

Published Apr 23, 2026 · Updated Apr 23, 2026 · Assigned by GitHub_M

Description

OpenTelemetry dotnet is a dotnet telemetry framework. In 1.6.0-rc.1 and earlier, OpenTelemetry.Exporter.Jaeger may allow sustained memory pressure when the internal pooled-list sizing grows based on a large observed span/tag set and that enlarged size is reused for subsequent allocations. Under high-cardinality or attacker-influenced telemetry input, this can increase memory consumption and potentially cause denial of service. There is no plan to fix this issue as OpenTelemetry.Exporter.Jaeger was deprecated in 2023.

Affected products

VendorProductAffectedFixed
open-telemetry opentelemetry-dotnet <= 1.6.0-rc.1 —
open-telemetry OpenTelemetry.Exporter.Jaeger <= 1.6.0-rc.1 —

Affected packages

EcosystemPackageAffectedFixedRecord
NuGet OpenTelemetry.Exporter.Jaeger <= 1.6.0-rc.1 — GHSA-38h3-2333-qx47

References