---
id: CVE-2026-39882
title: >-
  github.com/open-telemetry/opentelemetry-go: OpenTelemetry-Go: Memory
  exhaustion via uncapped HTTP response body reading (CVE-2026-39882)
summary: >-
  A flaw was found in OpenTelemetry-Go. The otlp HTTP exporters read the full
  HTTP response body into an in-memory buffer without a size cap. A remote
  attacker, by controlling the collector endpoint or performing a
  man-in-the-middle (MITM) a…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-770
vendor: Red Hat
product: Red Hat OpenShift Container Platform 4.22
affected:
  - multicluster_engine_for_kubernetes
  - openshift_container_platform 4.22
patched:
  - openshift_container_platform 4.22
published: '2026-04-08'
updated: '2026-09-21'
sourceUpdated: '2026-09-21T10:49:20+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39882.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39882.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-39882'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2456727'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-39882'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-39882'
  - url: 'https://github.com/open-telemetry/opentelemetry-go/pull/8108'
  - url: >-
      https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rr-5gcm-pp58
  - url: 'https://access.redhat.com/errata/RHSA-2026:54770'
  - url: 'https://access.redhat.com/errata/RHSA-2026:37585'
  - url: 'https://github.com/open-telemetry/opentelemetry-go'
  - url: 'http://github.com/open-telemetry/opentelemetry-go/releases/tag/v1.43.0'
tags:
  - csaf
  - vex
  - red-hat
  - osv
  - go
  - score-dispute
epss: 0.00228
epssPercentile: 0.12088
aliases:
  - GHSA-w8rr-5gcm-pp58
  - GO-2026-4985
ecosystem: go
scores:
  vendor: 7.5
  osv: 5.3
ingestedAt: '2026-07-09T18:56:36.964Z'
---

## Overview

A flaw was found in OpenTelemetry-Go. The otlp HTTP exporters read the full HTTP response body into an in-memory buffer without a size cap. A remote attacker, by controlling the collector endpoint or performing a man-in-the-middle (MITM) attack on the exporter connection, can exploit this to cause memory exhaustion. This vulnerability can lead to a Denial of Service (DoS) for the affected system.

## Vendor advisories

- **RHSA-2026:54770** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.22 · released 2026-08-18 · [advisory](https://access.redhat.com/errata/RHSA-2026:54770)
- **RHSA-2026:37585** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.22 · released 2026-07-14 · [advisory](https://access.redhat.com/errata/RHSA-2026:37585)
- **Red Hat VEX** · Important · affected: Multicluster Engine for Kubernetes · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39882.json)

**github.com/open-telemetry/opentelemetry-go: OpenTelemetry-Go: Memory exhaustion via uncapped HTTP response body reading** — rated Important by Red Hat. Released 2026-04-08, updated 2026-09-21.

Affected:

- Multicluster Engine for Kubernetes

Fixed:

- Red Hat OpenShift Container Platform 4.22

Not affected:

- Red Hat OpenShift Container Platform 4.22

## Remediation

For OpenShift Container Platform 4.22 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:

https://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html/release_notes/

You may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.

The sha values for the release are as fol… https://access.redhat.com/errata/RHSA-2026:54770
For OpenShift Container Platform 4.22 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:

https://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html/release_notes/

You may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.

The sha values for the release are as fol… https://access.redhat.com/errata/RHSA-2026:37585

## Package advisory (CVE-2026-39882)

Affected packages:

- `go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp < 1.43.0`
- `go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp < 1.43.0`
- `go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp < 0.19.0`

Patched in:

- `go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp 1.43.0`
- `go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp 1.43.0`
- `go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp 0.19.0`

Source: https://osv.dev/vulnerability/GHSA-w8rr-5gcm-pp58