CVE-2026-44213
MEDIUMOpenTelemetry.Exporter.Instana bypasses TLS certificate validation when a proxy is configured
Title source: cnaDescription
The OpenTelemetry.Exporter.Instana exports telemetry to Instana backend. Prior to 1.1.0, the OpenTelemetry.Exporter.Instana NuGet package does not validate HTTPS/TLS certificates are valid when sending telemetry to a configured Instana back-end when a proxy is configured using the INSTANA_ENDPOINT_PROXY environment variable. If a network attacker can Man-in-the-Middle (MitM) the proxy connection, all OpenTelemetry telemetry data and the Instana API key are exposed to the attacker. This vulnerability is fixed in 1.1.0.
References (1)
Core 1
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/open-telemetry/opentelemetry-dotnet-contrib/security/advisories/GHSA-wfr5-454p-mjc2
Scores
CVSS v3
6.5
EPSS
0.0021
EPSS Percentile
10.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-295
Status
published
Products (2)
nuget/OpenTelemetry.Exporter.Instana
0 - 1.1.0NuGet
open-telemetry/opentelemetry-dotnet-contrib
< 1.1.0
Published
May 26, 2026
Tracked Since
May 27, 2026