CVE-2026-44213 Details
Description
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.
A vulnerability exists in the OpenTelemetry.Exporter.Instana NuGet package, affecting versions through 1.0.7. The issue arises because the exporter does not properly validate HTTPS/TLS certificates when sending telemetry to an Instana backend via a proxy, as specified by the INSTANA_ENDPOINT_PROXY environment variable. This flaw can be exploited by a network attacker who can intercept the proxy connection, leading to the exposure of OpenTelemetry telemetry data and the Instana API key.
Users can update to OpenTelemetry.Exporter.Instana version 1.1.0 or later, where this vulnerability has been fixed. In environments where the previous behavior is needed, such as local development, the vulnerability can be reintroduced by configuring the HttpClient to accept any server certificate.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 27, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-295 | Improper Certificate Validation | [email protected] |
Affected Products
No affected product data is available for this CVE.
Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 24, 2026 | CVE Translated | [email protected] |
| Jul 23, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 27, 2026 | CVE Modified | CISA-ADP |
| May 26, 2026 | New CVE Received | [email protected] |