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

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`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.

Source published

8 Sep 2026 20:18:08 UTC

Source modified

9 Sep 2026 15:43:01 UTC

Saved here

23 Oct 2026 15:48:27 UTC

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

`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.

Source published

Sep 8, 2026, 8:18:08 PM (timezone not stated)

Source modified

Sep 9, 2026, 3:43:01 PM (timezone not stated)

Saved here

11 Nov 2026 16:10:15 UTC

Source terms

ENISA EUVD · source terms and attribution apply

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

`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.

Source published

8 Sep 2026 21:18:43 UTC

Source modified

10 Sep 2026 19:58:20 UTC

Saved here

25 Oct 2026 16:19:10 UTC

Source terms

NIST NVD usage terms; underlying source attribution retained

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CVSS 3.1 · [email protected] · Secondary · 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

### 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](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/1631). The vulnerability was fixed by [open-telemetry/opentelemetry-dotnet-contrib#4760](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/4760) which executes `ioreg` directly using its absolute path. ### Impact Applications running on **macOS** that use the `OpenTelemetry.Resources.Host` detector when an attacker who is *less privileged* than the application process can influence `PATH` or write to a `PATH` directory that precedes the system directories (e.g. a higher-privileged service with a user-writable directory in its search path, or a process inheriting an attacker-influenced environment). The attacker gains code execution in the application's security context through an attacker-controlled `ioreg` executable. ### Mitigation This vulnerability only affect macOS hosts - Linux and Windows hosts are unaffected. ### Workarounds None known. ### References - [GHSA-9h8m-3fm2-qjrq](https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-9h8m-3fm2-qjrq) - [open-telemetry/opentelemetry-dotnet-contrib#4760](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/4760) - [CWE-426](https://cwe.mitre.org/data/definitions/426.html)

Source published

16 Sep 2026 13:54:16 UTC

Source modified

16 Sep 2026 14:00:04 UTC

Saved here

23 Oct 2026 16:01:25 UTC

Source terms

GitHub Advisory Database · CC-BY-4.0

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Source: osv · GitHub Advisory Database · CC-BY-4.0. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS_V3 · CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Publisher rating · HIGH