OpenTelemetry opentelemetry-exporter-otlp-proto-http 1.5.0 before 1.45.0 Improper Certificate Validation

{
  "id": "d59057cc8adb45e11ca7b4642ccc4ad4f27d16776d6eab8f39fee8062d036d4e",
  "url": "https://osv.dev/vulnerability/CVE-2026-112006",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "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-middle attackers can impersonate the collector to read or alter exported traces, metrics, and logs, including authentication headers from OTEL_EXPORTER_OTLP_HEADERS.",
    "evidence": "osv:CVE-2026-112006",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-112006",
      "aliases": [
        "CVE-2026-112006"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/open-telemetry/opentelemetry-python",
              "type": "GIT",
              "events": [
                {
                  "introduced": "3b190f5af766294c5064d2787ab6c8681be1619d"
                },
                {
                  "fixed": "4f0fcfa53e53a8c654a34df0d0a1fd74483ebca2"
                },
                {
                  "fixed": "89cc68b9ea7e15969b4f042d63397bdc74a3d60e"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "1.5.0"
                      },
                      {
                        "fixed": "1.45.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "89cc68b9ea7e15969b4f042d63397bdc74a3d60e"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "4f0fcfa53e53a8c654a34df0d0a1fd74483ebca2"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v1.45.0"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.13.0",
            "v1.12.0",
            "v1.12.0rc2",
            "v1.12.0rc1",
            "v1.11.1",
            "v1.11.0",
            "v1.10.0",
            "v1.9.1",
            "v1.9.0",
            "v1.8.0",
            "v1.7.1",
            "v1.7.0",
            "v1.6.2",
            "v1.6.1",
            "v1.6.0",
            "v1.5.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-112006.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:28.553710554Z",
      "provider": "osv",
      "references": [
        "https://pypi.org",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112006.json",
        "https://github.com/open-telemetry/opentelemetry-python/releases/tag/v1.45.0",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-112006",
        "https://www.vulncheck.com/advisories/opentelemetry-opentelemetry-exporter-otlp-proto-http-1.5.0-before-1.45.0-improper-certificate-validation",
        "https://github.com/open-telemetry/opentelemetry-python/commit/89cc68b9ea7e15969b4f042d63397bdc74a3d60e",
        "https://github.com/open-telemetry/opentelemetry-python",
        "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",
        "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"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-295"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112006.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-112006",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 495405,
  "published_at": "2026-10-18T11:38:29.855+00:00"
}