Memory Allocation with Excessive Size Value Affecting go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp package, versions <1.43.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GOOPENTELEMETRYIOOTELEXPORTERSOTLPOTLPTRACEOTLPTRACEHTTP-15954196
- published9 Apr 2026
- disclosed8 Apr 2026
- credit1seal
Introduced: 8 Apr 2026
CVE-2026-39882 Â (opens in a new tab)How to fix?
Upgrade go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp to version 1.43.0 or higher.
Overview
Affected versions of this package are vulnerable to Memory Allocation with Excessive Size Value through the UploadTraces, UploadMetrics, and uploadLogs response-handling paths in exporters/otlp/otlptrace/otlptracehttp/client.go, exporters/otlp/otlpmetric/otlpmetrichttp/client.go, and exporters/otlp/otlplog/otlploghttp/client.go. An attacker can exhaust memory and crash the instrumented process by sending an oversized HTTP response body from a collector endpoint or a man-in-the-middle position. The vulnerable clients read the entire resp.Body into an in-memory bytes.Buffer for both success and error responses, allowing a malicious or misconfigured server to trigger large transient heap allocations during export. This breaks telemetry export and can terminate applications that send traces, metrics, or logs over OTLP HTTP.