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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.

PUBLISHED Reserved 2026-04-07 | Published 2026-04-08 | Updated 2026-04-09 | Assigner GitHub_M




MEDIUM: 5.3CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-789: Memory Allocation with Excessive Size Value

Product status

< 1.43.0
affected

References

github.com/...try-go/security/advisories/GHSA-w8rr-5gcm-pp58

github.com/open-telemetry/opentelemetry-go/pull/8108

cve.org (CVE-2026-39882)

nvd.nist.gov (CVE-2026-39882)

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