medium5.3
CVE-2026-39882
opentelemetry-go: OTLP HTTP exporters read unbounded HTTP response bodies
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp | < 1.43.0 | 1.43.0 |
| go | go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp | < 1.43.0 | 1.43.0 |
| go | go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp | < 0.19.0 | 0.19.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Opentelemetry | Opentelemetry | before 1.43.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-w8rr-5gcm-pp58
- https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rr-5gcm-pp58
- http://github.com/open-telemetry/opentelemetry-go/releases/tag/v1.43.0
- https://nvd.nist.gov/vuln/detail/CVE-2026-39882
- https://github.com/open-telemetry/opentelemetry-go/pull/8108