# CVE-2026-81871: OpenTelemetry-Go: Log gRPC exporter ignores env TLS certs, bypassing mTLS/pinning

CVE-2026-81871 is fixed in 2 products on 1 platform, first by SUSE-SU-2026:23984-1, released September 30, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-81871
- Priority: Routine
- CVSS: n/a (Moderate)
- EPSS: 0.0020
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 19, 2026
- Weakness: Improper Certificate Validation
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-81871

## Description

This update for helm fixes the following issues:  - CVE-2026-63209: github.com/klauspost/compress: signed integer overflow in s2.NewDict() allows an attacker to bypass   repeat index validation and cause a process crash (bsc#1283642). - CVE-2026-78669: golang.org/x/net/http2: excessive CPU consumption from repeated initial window changes (bsc#1285273). - CVE-2026-81871: go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc: OpenTelemetry-Go: TLS certificate bypass   allows log telemetry interception and alteration (bsc#1281468). - CVE-2026-81872: go.opentelemetry.io/otel/sdk/log: OpenTelemetry-Go: Denial of Service via attacker-driven log emission   (bsc#1281469). - CVE-2026-85732: oras.land/oras-go/v2: blind SSRF via unvalidated Link header URL in pagination allows internal network   probing (bsc#1281112).  Changes for helm:  - Update to version 3.22.1

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | distribution opensuse-leap 16.0 | 3.1.1-160000.4.1 | [OPENSUSE-SU-2026:22010-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22010-1.md) | Oct 1, 2026 |
| Linux | distribution sles 16.0 | 3.1.1-160000.4.1 | [SUSE-SU-2026:23990-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23990-1.md) | Oct 1, 2026 |
| Linux | helm opensuse-leap 16.0 | 4.3.0-160000.1.1 | [OPENSUSE-SU-2026:21983-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21983-1.md) | Sep 30, 2026 |
| Linux | helm sles 15.6 | 3.22.1-150000.1.104.1 | [SUSE-SU-2026:5119-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-5119-1.md) | Nov 7, 2026 |
| Linux | helm sles 15.7 | 3.22.1-150000.1.104.1 | [SUSE-SU-2026:5119-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-5119-1.md) | Nov 7, 2026 |
| Linux | helm sles 16.0 | 4.3.0-160000.1.1 | [SUSE-SU-2026:23984-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23984-1.md) | Sep 30, 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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