CVE-2026-39882: Opentelemetry

Medium severity, CVSS 5.3. EPSS: 0.2% chance of exploitation in the next 30 days.

OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to 1.43.0, the otlp HTTP exporters (traces/metrics/logs) read the full HTTP response body into an in-memory bytes.Buffer without a size cap. This is exploitable for memory exhaustion when the configured collector endpoint is attacker-controlled (or a network attacker can mitm the exporter connection). This vulnerability is fixed in 1.43.0.

Affected products

• Opentelemetry Opentelemetry: before 1.43.0 (fixed in 1.43.0)

Published 2026-04-08. Last modified 2026-07-24.