Vulnerability · Published Oct 18, 2026 · Assigned by VulnCheck
CVE-2026-112006OpenTelemetry opentelemetry-exporter-otlp-proto-http 1.5.0 before 1.45.0 Improper Certificate Validation
Medium 6.5
In plain English
A medium-severity improper certificate validation in opentelemetry-exporter-otlp-proto-http from OpenTelemetry. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
OpenTelemetry opentelemetry-exporter-otlp-proto-http 1.5.0 before 1.45.0 contains an improper certificate validation vulnerability that disables TLS verification when OTEL_EXPORTER_OTLP_CERTIFICATE variables are empty strings. Man-in-the-middle attackers can impersonate the collector to read or alter exported traces, metrics, and logs, including authentication headers from OTEL_EXPORTER_OTLP_HEADERS.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:14 | python-opentelemetry | 1.45.1-1 | DEBIAN-CVE-2026-112006 |
| Ubuntu:26.04:LTS | python-opentelemetry | no fix listed | UBUNTU-CVE-2026-112006 |
| Ubuntu:26.10 | python-opentelemetry | no fix listed | UBUNTU-CVE-2026-112006 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| OpenTelemetry | opentelemetry-exporter-otlp-proto-http | 1.5.0 – before 1.45.0 |
Weakness: CWE-295 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
References
- https://github.com/open-telemetry/opentelemetry-python/commit/89cc68b9ea7e15969b4f042d63397bdc74a3d60e patch
- opentelemetry-exporter-otlp-proto-http v1.45.0 Release Notes release-notes
- https://github.com/open-telemetry/opentelemetry-python/blob/v1.44.0/exporter/opentelemetry-exporter-otlp-proto-http/src/opentelemetry/exporter/otlp/proto/http/trace_exporter/__init__.py#L93-L96 technical-description
- https://github.com/open-telemetry/opentelemetry-python/blob/v1.44.0/exporter/opentelemetry-exporter-otlp-proto-http/src/opentelemetry/exporter/otlp/proto/http/trace_exporter/__init__.py#L170-L185 technical-description
- VulnCheck Advisory: OpenTelemetry opentelemetry-exporter-otlp-proto-http 1.5.0 before 1.45.0 Improper Certificate Validation third-party-advisory