CVE-2026-41078: Opentelemetry

Medium severity, CVSS 5.9. EPSS: 0.4% chance of exploitation in the next 30 days.

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

• Opentelemetry Opentelemetry: before 1.6.0 (fixed in 1.6.0); version 1.6.0 only

Published 2026-04-23. Last modified 2026-06-17.