Vulnerability in Open-telemetry Opentelemetry-dotnet
CVE-2026-42191
OpenTelemetry.Exporter.OpenTelemetryProtocol is the OTLP (OpenTelemetry Protocol) exporter implementation. From 1.8.0 to 1.15.2, the OTLP disk retry feature in OpenTelemetry.Exporter.OpenTelemetryProtocol silently fell back to Path.GetTemp…
EPSS: 0.000 (2.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L.
Affected products
- Open-telemetry Opentelemetry-dotnet — versions >= 1.8.0, < 1.15.3
- Opentelemetry Opentelemetry.exporter.opentelemetryprotocol
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Mitigation, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC, Issue Tracking)
Frequently asked questions
- What is CVE-2026-42191?
- CVE-2026-42191 is a medium-severity vulnerability in Open-telemetry Opentelemetry-dotnet, classified under Creation of Temporary File in Directory with Insecure Permissions. CVSS score: 6.5/10. Published 2026-05-12.
- How severe is CVE-2026-42191?
- Medium severity. CVSS v3 base score is 6.5 out of 10.