GHSA-9VCR-G537-3W5V中危已审查

Fleet vulnerable to OS command injection in software packages

OSV 1.4.0 · github-reviewed · 修改于 2026-05-16 07:45

发布时间

2026-05-14 21:17

GitHub 审查时间

2026-05-14 21:17

NVD 发布时间

2026-05-15 04:17

源文件

advisories/github-reviewed/2026/05/GHSA-9vcr-g537-3w5v/GHSA-9vcr-g537-3w5v.json

公告说明

Summary

A vulnerability in Fleet's software installer pipeline could allow a crafted software package to execute arbitrary commands as root (macOS/Linux) or SYSTEM (Windows) on managed endpoints when an uninstall is triggered.

Impact

When a software package (.pkg, .deb, .rpm, .exe, or .msi) is uploaded to Fleet, metadata is extracted from the package binary and used to generate uninstall scripts. In affected versions, this metadata is not properly sanitized before being included in the generated scripts. A specially crafted package containing malicious values in its metadata fields could result in unintended command execution when the uninstall script runs on managed endpoints.

Workarounds

If an immediate upgrade is not possible, administrators should avoid uploading software packages obtained from untrusted or unverified sources. Additionally, administrators can manually inspect and edit auto-generated uninstall scripts before deployment.

For more information

If you have any questions or comments about this advisory:

Email us at [[email protected]](mailto:[email protected])

Join #fleet in [osquery Slack](https://join.slack.com/t/osquery/shared_invite/zt-h29zm0gk-s2DBtGUTW4CFel0f0IjTEw)

Credits

We thank @secfox-ai for responsibly reporting this issue.

受影响的软件包

标识信息

别名 / CVE

CVE-2026-26191

CWE

CWE-78

软件生态

扩展资料

暂无扩展资料。

CVSS 评分

CVSS_V4

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

原始 OSV JSON

{
  "id": "GHSA-9vcr-g537-3w5v",
  "aliases": [
    "CVE-2026-26191"
  ],
  "details": "### Summary\n\nA vulnerability in Fleet's software installer pipeline could allow a crafted software package to execute arbitrary commands as root (macOS/Linux) or SYSTEM (Windows) on managed endpoints when an uninstall is triggered.\n\n### Impact\n\nWhen a software package (.pkg, .deb, .rpm, .exe, or .msi) is uploaded to Fleet, metadata is extracted from the package binary and used to generate uninstall scripts. In affected versions, this metadata is not properly sanitized before being included in the generated scripts. A specially crafted package containing malicious values in its metadata fields could result in unintended command execution when the uninstall script runs on managed endpoints.\n\n### Workarounds\n\nIf an immediate upgrade is not possible, administrators should avoid uploading software packages obtained from untrusted or unverified sources. Additionally, administrators can manually inspect and edit auto-generated uninstall scripts before deployment.\n\n### For more information\n\nIf you have any questions or comments about this advisory:\n\nEmail us at [[[email protected]](mailto:[email protected])](mailto:[email protected])\n\nJoin #fleet in [[osquery Slack](https://join.slack.com/t/osquery/shared_invite/zt-h29zm0gk-s2DBtGUTW4CFel0f0IjTEw)](https://join.slack.com/t/osquery/shared_invite/zt-h29zm0gk-s2DBtGUTW4CFel0f0IjTEw)\n\n### Credits\n\nWe thank @secfox-ai for responsibly reporting this issue.",
  "summary": "Fleet vulnerable to OS command injection in software packages",
  "affected": [
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.81.1"
            }
          ]
        }
      ],
      "package": {
        "name": "github.com/fleetdm/fleet/v4",
        "ecosystem": "Go"
      }
    }
  ],
  "modified": "2026-05-15T23:45:34Z",
  "severity": [
    {
      "type": "CVSS_V4",
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"
    }
  ],
  "published": "2026-05-14T13:17:36Z",
  "references": [
    {
      "url": "https://github.com/fleetdm/fleet/security/advisories/GHSA-9vcr-g537-3w5v",
      "type": "WEB"
    },
    {
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-26191",
      "type": "ADVISORY"
    },
    {
      "url": "https://github.com/fleetdm/fleet",
      "type": "PACKAGE"
    },
    {
      "url": "https://github.com/fleetdm/fleet/releases/tag/fleet-v4.81.1",
      "type": "WEB"
    }
  ],
  "schema_version": "1.4.0",
  "database_specific": {
    "cwe_ids": [
      "CWE-78"
    ],
    "severity": "MODERATE",
    "github_reviewed": true,
    "nvd_published_at": "2026-05-14T20:17:02Z",
    "github_reviewed_at": "2026-05-14T13:17:36Z"
  }
}