# CVE-2026-39882: OpenTelemetry-Go OTLP HTTP exporters read unbounded HTTP response bodies

CVE-2026-39882 is fixed in 13 products on 1 platform, first by DEBIAN-CVE-2026-39882, released April 8, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-39882
- Priority: Routine
- CVSS: 5.3 (Moderate)
- EPSS: 0.0020
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 8, 2026
- Weakness: Memory Allocation with Excessive Size Value
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-39882

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | amazon-cloudwatch-agent amzn 2023 | 1.300066.2-2.amzn2023 | [ALAS2023-2026-1747](https://patchblox.com/security/data/fix/linux/alas2023-2026-1747.md) | May 25, 2026 |
| Linux | containerd amzn 2023 | 2.2.3-1.amzn2023.0.1 | [ALAS2023-2026-1606](https://patchblox.com/security/data/fix/linux/alas2023-2026-1606.md) | Apr 27, 2026 |
| Linux | containerd-debuginfo amzn 2023 | 2.2.3-1.amzn2023.0.1 | [ALAS2023-2026-1606](https://patchblox.com/security/data/fix/linux/alas2023-2026-1606.md) | Apr 27, 2026 |
| Linux | containerd-debugsource amzn 2023 | 2.2.3-1.amzn2023.0.1 | [ALAS2023-2026-1606](https://patchblox.com/security/data/fix/linux/alas2023-2026-1606.md) | Apr 27, 2026 |
| Linux | containerd-stress amzn 2023 | 2.2.3-1.amzn2023.0.1 | [ALAS2023-2026-1606](https://patchblox.com/security/data/fix/linux/alas2023-2026-1606.md) | Apr 27, 2026 |
| Linux | containerd-stress-debuginfo amzn 2023 | 2.2.3-1.amzn2023.0.1 | [ALAS2023-2026-1606](https://patchblox.com/security/data/fix/linux/alas2023-2026-1606.md) | Apr 27, 2026 |
| Linux | docker amzn 2023 | 25.0.14-1.amzn2023.0.5 | [ALAS2023-2026-1659](https://patchblox.com/security/data/fix/linux/alas2023-2026-1659.md) | May 11, 2026 |
| Linux | docker-debuginfo amzn 2023 | 25.0.14-1.amzn2023.0.5 | [ALAS2023-2026-1659](https://patchblox.com/security/data/fix/linux/alas2023-2026-1659.md) | May 11, 2026 |
| Linux | docker-debugsource amzn 2023 | 25.0.14-1.amzn2023.0.5 | [ALAS2023-2026-1659](https://patchblox.com/security/data/fix/linux/alas2023-2026-1659.md) | May 11, 2026 |
| Linux | golang-opentelemetry-otel Debian 14 | 1.43.0-1 | [DEBIAN-CVE-2026-39882](https://patchblox.com/security/data/fix/linux/debian-cve-2026-39882.md) | Apr 8, 2026 |
| Linux | govulncheck-vulndb opensuse-leap 16.0 | 0.0.20260723T184607-160000.1.1 | [OPENSUSE-SU-2026:21483-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21483-1.md) | Jul 30, 2026 |
| Linux | grafana opensuse-leap 16.0 | 12.4.10-bp160.1.1 | [OPENSUSE-SU-2026:22125-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22125-1.md) | Nov 7, 2026 |
| Linux | grafana sles 15.7 | 12.4.10-150200.3.94.3 | [SUSE-SU-2026:4600-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4600-1.md) | Nov 7, 2026 |
| Linux | system-user-grafana sles 15.7 | 1.0.0-150200.5.8.1 | [SUSE-SU-2026:4600-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4600-1.md) | Nov 7, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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