ghsa-v8pv-4842-x354

{
  "affected": [
    {
      "database_specific": {
        "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-v8pv-4842-x354/GHSA-v8pv-4842-x354.json"
      },
      "package": {
        "ecosystem": "NuGet",
        "name": "OpenTelemetry.Resources.Host",
        "purl": "pkg:nuget/OpenTelemetry.Resources.Host"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.16.0-beta.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-81192"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-426"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-16T13:54:16Z",
    "nvd_published_at": "2026-09-08T21:18:43Z",
    "severity": "HIGH"
  },
  "details": "### 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)",
  "id": "GHSA-v8pv-4842-x354",
  "modified": "2026-09-16T14:00:04.957357011Z",
  "published": "2026-09-16T13:54:16Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/open-telemetry/opentelemetry-dotnet-contrib/security/advisories/GHSA-v8pv-4842-x354"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-81192"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/1631"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/4760"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/open-telemetry/opentelemetry-dotnet-contrib"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "OpenTelemetry.Resources.Host vulnerable to arbitrary code execution via local PATH hijacking on macOS"
}