Vulnerability-Lookup

CNVD-2026-16891

Vulnerability from cnvd - Published: 2026-04-09

Title

Fleet操作系统命令注入漏洞

Description

Fleet是Fleet Device Management开源的一个设备管理平台，支持多种操作系统和设备，帮助IT和安全团队进行设备管理、漏洞报告、MDM等操作。 Fleet 4.81.1之前版本存在操作系统命令注入漏洞。该漏洞源于软件安装程序管道未能正确过滤构造命令特殊字符、命令等，攻击者可利用该漏洞在受管主机上以root或SYSTEM权限执行任意代码。

Severity

高

Patch Name

Fleet操作系统命令注入漏洞的补丁

Patch Description

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://github.com/fleetdm/fleet/releases

Reference

https://nvd.nist.gov/vuln/detail/CVE-2026-34387

Impacted products

Name
Fleet Fleet <4.81.1

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-34387",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-34387"
    }
  },
  "description": "Fleet\u662fFleet Device Management\u5f00\u6e90\u7684\u4e00\u4e2a\u8bbe\u5907\u7ba1\u7406\u5e73\u53f0\uff0c\u652f\u6301\u591a\u79cd\u64cd\u4f5c\u7cfb\u7edf\u548c\u8bbe\u5907\uff0c\u5e2e\u52a9IT\u548c\u5b89\u5168\u56e2\u961f\u8fdb\u884c\u8bbe\u5907\u7ba1\u7406\u3001\u6f0f\u6d1e\u62a5\u544a\u3001MDM\u7b49\u64cd\u4f5c\u3002\n\nFleet 4.81.1\u4e4b\u524d\u7248\u672c\u5b58\u5728\u64cd\u4f5c\u7cfb\u7edf\u547d\u4ee4\u6ce8\u5165\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u8f6f\u4ef6\u5b89\u88c5\u7a0b\u5e8f\u7ba1\u9053\u672a\u80fd\u6b63\u786e\u8fc7\u6ee4\u6784\u9020\u547d\u4ee4\u7279\u6b8a\u5b57\u7b26\u3001\u547d\u4ee4\u7b49\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5728\u53d7\u7ba1\u4e3b\u673a\u4e0a\u4ee5root\u6216SYSTEM\u6743\u9650\u6267\u884c\u4efb\u610f\u4ee3\u7801\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://github.com/fleetdm/fleet/releases",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-16891",
  "openTime": "2026-04-09",
  "patchDescription": "Fleet\u662fFleet Device Management\u5f00\u6e90\u7684\u4e00\u4e2a\u8bbe\u5907\u7ba1\u7406\u5e73\u53f0\uff0c\u652f\u6301\u591a\u79cd\u64cd\u4f5c\u7cfb\u7edf\u548c\u8bbe\u5907\uff0c\u5e2e\u52a9IT\u548c\u5b89\u5168\u56e2\u961f\u8fdb\u884c\u8bbe\u5907\u7ba1\u7406\u3001\u6f0f\u6d1e\u62a5\u544a\u3001MDM\u7b49\u64cd\u4f5c\u3002\r\n\r\nFleet 4.81.1\u4e4b\u524d\u7248\u672c\u5b58\u5728\u64cd\u4f5c\u7cfb\u7edf\u547d\u4ee4\u6ce8\u5165\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u8f6f\u4ef6\u5b89\u88c5\u7a0b\u5e8f\u7ba1\u9053\u672a\u80fd\u6b63\u786e\u8fc7\u6ee4\u6784\u9020\u547d\u4ee4\u7279\u6b8a\u5b57\u7b26\u3001\u547d\u4ee4\u7b49\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5728\u53d7\u7ba1\u4e3b\u673a\u4e0a\u4ee5root\u6216SYSTEM\u6743\u9650\u6267\u884c\u4efb\u610f\u4ee3\u7801\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Fleet\u64cd\u4f5c\u7cfb\u7edf\u547d\u4ee4\u6ce8\u5165\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Fleet Fleet \u003c4.81.1"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2026-34387",
  "serverity": "\u9ad8",
  "submitTime": "2026-04-09",
  "title": "Fleet\u64cd\u4f5c\u7cfb\u7edf\u547d\u4ee4\u6ce8\u5165\u6f0f\u6d1e"
}

CVE-2026-34387 (GCVE-0-2026-34387)

Vulnerability from cvelistv5 – Published: 2026-03-27 18:31 – Updated: 2026-03-27 19:31

Title

Fleet vulnerable to OS command injection via crafted software package metadata in uninstall scripts

Summary

Fleet is open source device management software. Prior to 4.81.1, a command injection vulnerability in Fleet's software installer pipeline allows an attacker to achieve arbitrary code execution as root (macOS/Linux) or SYSTEM (Windows) on managed hosts when an uninstall is triggered for a crafted software package. Version 4.81.1 patches the issue.

Severity

5.7 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-27 19:31 UTC

CWE

CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Assigner

GitHub_M mitre root Scorecard

References

1 reference

URL	Tags
https://github.com/fleetdm/fleet/security/advisor…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
fleetdm	fleet	Affected: < 4.81.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-34387",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-27T19:31:45.614382Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-27T19:31:54.764Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "fleet",
          "vendor": "fleetdm",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 4.81.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Fleet is open source device management software. Prior to 4.81.1, a command injection vulnerability in Fleet\u0027s software installer pipeline allows an attacker to achieve arbitrary code execution as root (macOS/Linux) or SYSTEM (Windows) on managed hosts when an uninstall is triggered for a crafted software package. Version 4.81.1 patches the issue."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 5.7,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "HIGH",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "ACTIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-78",
              "description": "CWE-78: Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-27T18:31:27.871Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/fleetdm/fleet/security/advisories/GHSA-7rhw-5mpv-gp4h",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/fleetdm/fleet/security/advisories/GHSA-7rhw-5mpv-gp4h"
        }
      ],
      "source": {
        "advisory": "GHSA-7rhw-5mpv-gp4h",
        "discovery": "UNKNOWN"
      },
      "title": "Fleet vulnerable to OS command injection via crafted software package metadata in uninstall scripts"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-34387",
    "datePublished": "2026-03-27T18:31:27.871Z",
    "dateReserved": "2026-03-27T13:45:29.619Z",
    "dateUpdated": "2026-03-27T19:31:54.764Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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CNVD-2026-16891

CVE-2026-34387 (GCVE-0-2026-34387)

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