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

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

7.0 · CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

• CVE-2026-81192: 0.18% estimated exploitation activity in the next 30 days; percentile 7.28 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary The OpenTelemetry.Resources.Host NuGet package is affected by an untrusted search path vulnerability on macOS. 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. Details The implementation of the host detector macOS has always invoked ioreg and sh via their bare names since it was implemented by open-telemetry/opentelemetry-dotnet-contrib#1631. The vulnerability was fixed by open-telemetry/opentelemetry-dotnet-contrib#4760 which executes ioreg directly using its absolute path. Impact Applications running on macOS that use the…

Published by the source

16 Sep 2026, 13:54 UTC

Last modified by the source

16 Sep 2026, 14:00 UTC

Source last checked

26 Oct 2026, 17:05 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-v8pv-4842-x354

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-v8pv-4842-x354

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# Patch Next advisory brief: CVE-2026-81192

Advisory: OpenTelemetry.Resources.Host vulnerable to arbitrary code execution via local PATH hijacking on macOS
IDs: CVE-2026-81192, GHSA-v8pv-4842-x354
Record: https://patchnext.com/advisories/cve-2026-81192 (revision 2, source checked 26 Oct 2026, 17:05 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.0)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: opentelemetry.resources.host 1.16.0-beta.2. A vendor fix does not mean a deployment is fixed.

## Affected components
- NuGet opentelemetry.resources.host: affected < 1.16.0-beta.2; fixed in 1.16.0-beta.2

## Suggested inspection (read-only)
- NuGet opentelemetry.resources.host: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on opentelemetry.resources.host.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-v8pv-4842-x354 (OSV record GHSA-v8pv-4842-x354 lists affected ranges: NuGet opentelemetry.resources.host >=0 <1.16.0-beta.2 (fixed))
- Verified: https://github.com/advisories/GHSA-v8pv-4842-x354 (GitHub-reviewed advisory GHSA-v8pv-4842-x354 lists affected ranges: NuGet opentelemetry.resources.host >=0 <1.16.0-beta.2)

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