---
id: CVE-2026-112006
title: >-
  OpenTelemetry opentelemetry-exporter-otlp-proto-http 1.5.0 before 1.45.0
  Improper Certificate Validation
summary: >-
  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…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-295
vendor: OpenTelemetry
product: opentelemetry-exporter-otlp-proto-http
affected:
  - opentelemetry-exporter-otlp-proto-http >= 1.5.0 < 1.45.0
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-19T15:58:20.248346Z'
published: '2026-10-18'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T15:59:16.298Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-112006'
references:
  - url: >-
      https://github.com/open-telemetry/opentelemetry-python/commit/89cc68b9ea7e15969b4f042d63397bdc74a3d60e
  - url: >-
      https://github.com/open-telemetry/opentelemetry-python/releases/tag/v1.45.0
    label: opentelemetry-exporter-otlp-proto-http v1.45.0 Release Notes
  - url: >-
      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
  - url: >-
      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
  - url: >-
      https://www.vulncheck.com/advisories/opentelemetry-opentelemetry-exporter-otlp-proto-http-1.5.0-before-1.45.0-improper-certificate-validation
    label: >-
      VulnCheck Advisory: OpenTelemetry opentelemetry-exporter-otlp-proto-http
      1.5.0 before 1.45.0 Improper Certificate Validation
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-112006.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-112006'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2554746'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-112006'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-112006'
tags:
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00215
epssPercentile: 0.11817
ingestedAt: '2026-10-18T11:40:26.623Z'
---

## Overview

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

- `opentelemetry-exporter-otlp-proto-http >= 1.5.0 < 1.45.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Ansible Automation Orchestrator 2026, Exploit Intelligence, Lightspeed Core, OpenShift Lightspeed, Red Hat AI Inference Server, Red Hat Ansible Automation Platform 2, … · no fix planned: Exploit Intelligence, Red Hat Ansible Automation Platform 2, Red Hat Update Infrastructure 4 for Cloud Providers, Ansible Automation Orchestrator 2026, … · updated 2026-10-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-112006.json)