Resource exhaustion in Open-Telemetry Opentelemetry-Dotnet
CVE-2026-41078
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (29.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.001
Affected products
- Open-Telemetry Opentelemetry-Dotnet — versions <= 1.6.0-rc.1
- Open-Telemetry Opentelemetry.exporter.jaeger — versions <= 1.6.0-rc.1
- Opentelemetry — versions 1.6.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-41078?
- CVE-2026-41078 is a medium-severity vulnerability in Open-Telemetry Opentelemetry-Dotnet, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.9/10. Published 2026-04-23.
- How severe is CVE-2026-41078?
- Medium severity. CVSS v3 base score is 5.9 out of 10.