What is CVE-2026-39882?

CVE-2026-39882 is a medium-severity vulnerability in Open-telemetry Opentelemetry-go, classified under CWE-789. CVSS score: 5.3/10. Published 2026-04-08.

How severe is CVE-2026-39882?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Open-telemetry Opentelemetry-go

CVE-2026-39882

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 e…

EPSS: 0.000 (0.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Open-telemetry Opentelemetry-go — versions < 1.43.0

Weakness classification (CWE)

CWE-789

References

https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rr-5gcm-pp58 (x_refsource_CONFIRM)
https://github.com/open-telemetry/opentelemetry-go/pull/8108 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-39882?: CVE-2026-39882 is a medium-severity vulnerability in Open-telemetry Opentelemetry-go, classified under CWE-789. CVSS score: 5.3/10. Published 2026-04-08.
How severe is CVE-2026-39882?: Medium severity. CVSS v3 base score is 5.3 out of 10.