Vulnerability in Opentelemetry Opentelemetry-Exporter-Otlp-Proto-Http
CVE-2026-112006
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.
Vulnerability class: Improper Certificate Validation
Published .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/open-telemetry/opentelemetry-python/commit/89cc68b9ea7e15969b4f042d6… (patch)
- github.com/open-telemetry/opentelemetry-python/releases/tag/v1.45.0 (release-notes)
- github.com/open-telemetry/opentelemetry-python/blob/v1.44.0/exporter/openteleme… (technical-description)
- github.com/open-telemetry/opentelemetry-python/blob/v1.44.0/exporter/openteleme… (technical-description)
- www.vulncheck.com/advisories/opentelemetry-opentelemetry-exporter-otlp-proto-ht… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-112006?
- CVE-2026-112006 is a medium-severity vulnerability in Opentelemetry Opentelemetry-Exporter-Otlp-Proto-Http, classified under Improper Certificate Validation. CVSS score: 6.5/10. Published 2026-10-18.
- How severe is CVE-2026-112006?
- Medium severity. CVSS v3 base score is 6.5 out of 10.