Is CVE-2026-39882 actively exploited?

No active exploitation of CVE-2026-39882 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-39882 be exploited remotely?

Partially. CVE-2026-39882 requires adjacent network access (same network segment) to exploit.

What is the CVSS score of CVE-2026-39882?

CVE-2026-39882 has a CVSS score of 5.3 (MEDIUM).

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MEDIUM

CVE-2026-39882

CWE-789Published: April 8, 2026· Updated: Apr 9, 2026

5.3

CVSS v3.1

EPSS:0.02%probability of exploitation in 30 daysPercentile:3.4th

Official 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.

NVD Source

Technical Analysis

CVE-2026-39882 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.3.