CVE-2026-39882
OpenTelemetry-Go OTLP HTTP exporters read unbounded HTTP response bodies
- State
- Published
- Severity
- 5.3 Medium
- Published
- Apr 8, 2026
- Updated
- Apr 9, 2026
- Reserved
- Apr 7, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.3 Medium | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H | GitHub_M |
Weaknesses
- CWE-789 Memory Allocation with Excessive Size Value
Affected Products
| Product | Versions |
|---|---|
opentelemetry-goopen-telemetry |
|
References
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