CVE-2026-41078 — OpenTelemetry dotnet: Potential memory exhaustion via unbounded pooled-list sizing in Jaeger exporter conversion path

Description (CNA)

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 (CNA)

Vendor / product	Versions
open-telemetry / opentelemetry-dotnet	affected <= 1.6.0-rc.1
open-telemetry / OpenTelemetry.Exporter.Jaeger	affected <= 1.6.0-rc.1

CWE

CWE-770

References

https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-38h3-2333-qx47

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.