UBUNTU-CVE-2026-81871

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2026-81871
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-81871.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-81871
Upstream
Published
2026-09-18T00:00:00Z
Modified
2026-09-18T12:30:35Z
Severity
  • 6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to version 0.21.0, the exporters/otlp/otlplog/otlploggrpc package loads OTEL_EXPORTER_OTLP_LOGS_CERTIFICATE, OTEL_EXPORTER_OTLP_CERTIFICATE, and related client certificate environment variables through loadEnvTLS into cfg.tlsCfg, but newGRPCDialOptions does not apply cfg.tlsCfg when creating gRPC transport credentials. The environment-only TLS path instead uses credentials.NewTLS with system roots and no configured client certificate, bypassing intended private CA pinning and mutual TLS unless the application also supplies WithTLSCredentials. A network attacker able to intercept or spoof the collector connection with a system-trusted certificate can read or alter log telemetry. This issue is fixed in version 0.21.0.

References

Affected packages

Ubuntu:22.04:LTS / golang-opentelemetry-otel

Package

Name
golang-opentelemetry-otel
Purl
pkg:deb/ubuntu/golang-opentelemetry-otel?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.1.0-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "golang-opentelemetry-otel-dev",
            "binary_version": "1.1.0-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-81871.json"

Ubuntu:24.04:LTS / golang-opentelemetry-otel

Package

Name
golang-opentelemetry-otel
Purl
pkg:deb/ubuntu/golang-opentelemetry-otel?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.16.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "golang-opentelemetry-otel-dev",
            "binary_version": "1.16.0-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-81871.json"

Ubuntu:26.04:LTS / golang-opentelemetry-otel

Package

Name
golang-opentelemetry-otel
Purl
pkg:deb/ubuntu/golang-opentelemetry-otel?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.31.0-4
1.31.0-5
1.31.0-6

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "golang-opentelemetry-otel-dev",
            "binary_version": "1.31.0-6"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-81871.json"