CVE-2026-39882
Oversized OTLP HTTP response bodies can cause memory exhaustion in go.opentelemetry.io/otel/exporters/otlp
5.3
MEDIUM
CVSS 3.1
EPSS 0.01%
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.
How to fix CVE-2026-39882
To remediate CVE-2026-39882, upgrade the affected package to a fixed version below.
- —no fix listed
- —upgrade to 0.19.0 or later
- —upgrade to 0.19.0 or later
- —upgrade to 1.43.0 or later
- —upgrade to 1.43.0 or later
- —upgrade to 1.43.0 or later
- —upgrade to 1.43.0 or later
Is CVE-2026-39882 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (7)
- from 0
- from 0, < 0.19.0
- from 0, < 0.19.0
- from 0, < 1.43.0
- from 0, < 1.43.0
- from 0, < 1.43.0
- from 0, < 1.43.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |