CVSS 3.1
5.3 mediumCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2026-39882
Medium (5.3) in opentelemetry opentelemetry. EPSS 0.2% chance of exploitation in the next 30 days. Fixed in go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp 1.43.0.
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.
Severity
- EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 8% of CVEs (scores of 2026-10-31)
- CWE
- CWE-789
- Published
- Modified
- Record from
- the NVD, synced
Affected
- opentelemetry:opentelemetry
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-w8rr-5gcm-pp58 | Go | go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp | <1.43.0 | 1.43.0 |
| GHSA-w8rr-5gcm-pp58 | Go | go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp | <1.43.0 | 1.43.0 |
| GHSA-w8rr-5gcm-pp58 | Go | go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp | <0.19.0 | 0.19.0 |
| GO-2026-4985 | Go | go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp | <0.19.0 | 0.19.0 |
| GO-2026-4985 | Go | go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp | <1.43.0 | 1.43.0 |
| GO-2026-4985 | Go | go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp | <1.43.0 | 1.43.0 |