CVE-2026-41078
Medium
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.
SeverityMedium
CVSS5.9
Exploit probability—
Product
Opentelemetry
PublishedApr 23, 2026
First seenApr 23, 2026
Weakness typeCWE-770Allocation of resources without limits
How to fix
Update
- opentelemetry opentelemetry1.6.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| opentelemetry opentelemetry | v < 1.6.0, 1.6.0 | 1.6.0 |
| OpenTelemetry.Exporter.JaegerNuGet | v ≤ 1.6.0-rc.1 | — |
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