OpenTelemetry.Resources.Host vulnerable to arbitrary code execution via local PATH hijacking on macOS (CVE-2026-81192) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-81192

OpenTelemetry.Resources.Host vulnerable to arbitrary code execution via local PATH hijacking on macOS

Answer in brief

CVE-2026-81192 records a Unknown severity vulnerability in OpenTelemetry.Resources.Host vulnerable to arbitrary code execution via local PATH hijacking on macOS. The current sources do not mark it as known exploited. The current feed maps open-telemetry/opentelemetry-dotnet-contrib (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 8, 2026Updated Sep 8, 2026Source checked Sep 8, 2026First seen by HOL Sep 8, 2026Material review Sep 8, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps open-telemetry/opentelemetry-dotnet-contrib (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
open-telemetry/opentelemetry-dotnet-contribgeneric	< 1.16.0-beta.2	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for open-telemetry/opentelemetry-dotnet-contrib.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 8, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 8, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 8, 2026

Sources and claim methodology

Upstream source description

`OpenTelemetry.Resources.Host` NuGet package, which provides OpenTelemetry resource detectors for host, is affected by an untrusted search path vulnerability on macOS. Prior to version 1.16.0-beta.2, the `host.id` resource attribute detector launches the `sh` and `ioreg` executables by bare name rather than by absolute path, so both are resolved through the `PATH` environment variable. A local attacker who is less privileged than the host application, and who can influence `PATH` or write to a directory that appears in `PATH` ahead of the system directories, can have an arbitrary binary executed in the application's security context, resulting in local code execution/privilege escalation. This vulnerability only affect macOS hosts - Linux and Windows hosts are unaffected. Version 1.16.0-beta.2 contains a patch. No known workarounds are available.

Quoted source text, attributed separately from HOL analysis.