CVE-2026-39882
MediumCVSS 5.3Exploitation Probability (EPSS)
Low risk9th percentile - higher than 9% of all known CVEs
Summary
The OpenTelemetry-Go library prior to version 1.43.0 reads the full HTTP response body into an in-memory buffer without a size cap, which can lead to memory exhaustion when the configured collector endpoint is attacker-controlled or when the connection is intercepted.
Risk Assessment
An attacker can cause a service crash by exhausting memory, leading to denial of service (DoS) for applications using this library.
Recommendation
It is recommended to update the OpenTelemetry-Go library to version 1.43.0 or later.
Original NVD description (English source)
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.