JoySafeter through 1.0.0 Authenticated RCE via Copilot Standard Mode Shell

{
  "id": "3d5d17db8d3bd6aeb41a219321aa7d218cc663a8799fda4d4bdd7dba6e12dcbb",
  "url": "https://osv.dev/vulnerability/CVE-2026-109443",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "JoySafeter through 1.0.0 Authenticated RCE via Copilot Standard Mode Shell",
    "summary": "JoySafeter through 1.0.0 contains a remote code execution vulnerability that allows authenticated users to run operating system commands via an unsandboxed execute tool in Copilot standard mode. Attackers can self-register, select standard mode in the WebSocket chat.start extension, and have the agent invoke subprocess.run with shell=True on the host to access other tenants' data and server secrets.",
    "evidence": "osv:CVE-2026-109443",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-109443",
      "aliases": [
        "CVE-2026-109443"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/jd-opensource/joysafeter",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "12234a11a9d96acef85577afb1fa5682169d6171"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.0.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.0.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.0.0",
            "v0.3.2",
            "v0.3.0",
            "v0.2.0",
            "v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-109443.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.756575632Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109443.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-109443",
        "https://www.vulncheck.com/advisories/joysafeter-through-1.0.0-authenticated-rce-via-copilot-standard-mode-shell",
        "https://github.com/jd-opensource/JoySafeter",
        "https://github.com/jd-opensource/JoySafeter/blob/12234a11a9d96acef85577afb1fa5682169d6171/backend/app/core/agent/backends/utils/command_executor.py#L110",
        "https://github.com/jd-opensource/JoySafeter/blob/12234a11a9d96acef85577afb1fa5682169d6171/backend/app/services/copilot_service.py#L106",
        "https://www.lasso.security/vulnerability-database/cve-2026-109443"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-653"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109443.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-109443",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 491562,
  "published_at": "2026-10-20T00:46:07.343+00:00"
}