{"id":"CVE-2026-81192","aliases":["EUVD-2026-74187","GHSA-v8pv-4842-x354"],"status":"published","title":"OpenTelemetry.Resources.Host vulnerable to arbitrary code execution via local PATH hijacking on macOS","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.","severity":{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00177,"percentile":0.07299,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-426"],"published":"2026-09-08T20:18:08Z","modified":"2026-10-28T02:31:07Z","fixes":[{"ecosystem":"NuGet","package":"OpenTelemetry.Resources.Host","fixed_in":["1.16.0-beta.2"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"NuGet","package":"OpenTelemetry.Resources.Host","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.16.0-beta.2"}]}]},{"source":"osv","ecosystem":"NuGet","package":"OpenTelemetry.Resources.Host","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.16.0-beta.2"}]}]}],"products":[{"vendor":"open-telemetry","product":"opentelemetry-dotnet-contrib"}],"references":[{"url":"https://github.com/open-telemetry/opentelemetry-dotnet-contrib/security/advisories/GHSA-v8pv-4842-x354","tags":["x_refsource_CONFIRM","advisory","web"]},{"url":"https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/1631","tags":["x_refsource_MISC","fix","web"]},{"url":"https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/4760","tags":["x_refsource_MISC","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-81192","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-v8pv-4842-x354"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81192.json","tags":["advisory"]},{"url":"https://github.com/open-telemetry/opentelemetry-dotnet-contrib","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-81192","title":"OpenTelemetry.Resources.Host vulnerable to arbitrary code execution via local PATH hijacking on macOS","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.","status":"published","published":"2026-09-08T20:18:08.845Z","modified":"2026-09-09T15:43:01.911Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-426"],"updated_at":"2026-11-02T13:36:18.075535Z"}],"euvd":[{"id":"EUVD-2026-74187","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.","status":"published","published":"2026-09-08T20:18:08Z","modified":"2026-09-09T15:43:01Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T17:28:26.882462Z"}],"ghsa":[{"id":"GHSA-v8pv-4842-x354","title":"OpenTelemetry.Resources.Host vulnerable to arbitrary code execution via local PATH hijacking on macOS","description":"### Summary\n\nThe `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\nthrough the `PATH` environment variable.\n\nA 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\ncode execution/privilege escalation.\n\n### Details\n\nThe 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).\n\nThe 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.\n\n### Impact\n\nApplications 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.\n\n### Mitigation\n\nThis vulnerability only affect macOS hosts - Linux and Windows hosts are unaffected.\n\n### Workarounds\n\nNone known.\n\n### References\n\n- [GHSA-9h8m-3fm2-qjrq](https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-9h8m-3fm2-qjrq)\n- [open-telemetry/opentelemetry-dotnet-contrib#4760](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/4760)\n- [CWE-426](https://cwe.mitre.org/data/definitions/426.html)","status":"published","published":"2026-09-16T13:54:16Z","modified":"2026-09-16T13:54:17Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-426"],"updated_at":"2026-11-02T14:41:17.136201Z"}],"nvd":[{"id":"CVE-2026-81192","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.","status":"published","published":"2026-09-08T21:18:43.447Z","modified":"2026-09-10T19:58:20.507Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-426"],"updated_at":"2026-11-02T14:12:45.612639Z"}],"osv":[{"id":"CVE-2026-81192","title":"OpenTelemetry.Resources.Host vulnerable to arbitrary code execution via local PATH hijacking on macOS","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.","status":"published","published":"2026-09-08T20:18:08.845Z","modified":"2026-10-28T02:31:07.222128623Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-426"],"updated_at":"2026-11-02T15:45:18.131258Z"},{"id":"GHSA-v8pv-4842-x354","title":"OpenTelemetry.Resources.Host vulnerable to arbitrary code execution via local PATH hijacking on macOS","description":"### Summary\n\nThe `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\nthrough the `PATH` environment variable.\n\nA 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\ncode execution/privilege escalation.\n\n### Details\n\nThe 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).\n\nThe 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.\n\n### Impact\n\nApplications 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.\n\n### Mitigation\n\nThis vulnerability only affect macOS hosts - Linux and Windows hosts are unaffected.\n\n### Workarounds\n\nNone known.\n\n### References\n\n- [GHSA-9h8m-3fm2-qjrq](https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-9h8m-3fm2-qjrq)\n- [open-telemetry/opentelemetry-dotnet-contrib#4760](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/4760)\n- [CWE-426](https://cwe.mitre.org/data/definitions/426.html)","status":"published","published":"2026-09-16T13:54:16Z","modified":"2026-09-16T14:00:04.957357011Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-426"],"updated_at":"2026-11-02T15:46:56.981655Z"}]}}