{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0.2.0"
              },
              {
                "last_affected": "0.2.0"
              },
              {
                "introduced": "0.2.1"
              },
              {
                "last_affected": "0.2.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "c018c3fb6a5cedf2dcd7bbd0bf4fce5eb9b54bf7"
            },
            {
              "fixed": "af582246f141311d574551b7571a517bcc3df750"
            }
          ],
          "repo": "https://github.com/hkuds/nanobot",
          "type": "GIT"
        }
      ],
      "versions": [
        "0.2.0",
        "0.2.1"
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulDB",
    "cwe_ids": [
      "CWE-74",
      "CWE-88"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90809.json"
  },
  "details": "A vulnerability was identified in HKUDS nanobot up to 0.2.1. The affected element is the function ExecTool._guard_command/ExecTool._spawn of the file nanobot/agent/tools/shell.py of the component ExecTool. Such manipulation leads to argument injection. It is possible to launch the attack remotely. The name of the patch is af582246f141311d574551b7571a517bcc3df750. It is best practice to apply a patch to resolve this issue.",
  "id": "CVE-2026-90809",
  "modified": "2026-09-16T03:30:25.113890555Z",
  "published": "2026-09-14T18:15:17.575Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/HKUDS/nanobot/"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90809.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90809"
    },
    {
      "type": "ADVISORY",
      "url": "https://vuldb.com/cve/CVE-2026-90809"
    },
    {
      "type": "ADVISORY",
      "url": "https://vuldb.com/submit/922850"
    },
    {
      "type": "ADVISORY",
      "url": "https://vuldb.com/vuln/403311"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/HKUDS/nanobot/issues/5306"
    },
    {
      "type": "REPORT",
      "url": "https://vuldb.com/vuln/403311/cti"
    },
    {
      "type": "FIX",
      "url": "https://github.com/HKUDS/nanobot/commit/af582246f141311d574551b7571a517bcc3df750"
    },
    {
      "type": "FIX",
      "url": "https://github.com/HKUDS/nanobot/pull/5345"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X",
      "type": "CVSS_V4"
    }
  ],
  "summary": "HKUDS nanobot ExecTool shell.py ExecTool._spawn argument injection"
}