{
  "schema_version": "1.6.0",
  "id": "ACVE-2026-0430",
  "aliases": [
    "CVE-2026-82533"
  ],
  "published": "2026-09-08T00:00:00Z",
  "modified": "2026-09-25T00:00:00Z",
  "summary": "DeepSeek Harness dsh 0.1.1-rc.2 and earlier, running a coding agent in its sandbox, let the agent disable its own confinement and write outside the session workspace.",
  "details": "## What\n\nOX Security reported that DeepSeek Harness exposed an unauthenticated local agent-control API and trusted a client-supplied host value. A sandboxed agent could therefore escape its confinement and affect files outside the session workspace.\n\n## Detection\n\nOX Security demonstrated the escape and reported CVE-2026-82533.\n\n## Fix\n\nUpgrade DeepSeek Harness to 0.1.2-alpha.1 or later.",
  "affected": [
    {
      "package": {
        "ecosystem": "AgentHarness",
        "name": "deepseek-harness"
      },
      "ranges": [
        {
          "type": "SEMVER",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.1.2-alpha.1"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "type": "REPORT",
      "url": "https://www.ox.security/blog/cve-2026-82533-deepseek-harness-ai-agent-sandbox-escape/"
    }
  ],
  "database_specific": {
    "severity": "CRITICAL",
    "acve": {
      "specVersion": 1,
      "status": "candidate",
      "kind": "code",
      "vulnClasses": [
        "sandbox-escape",
        "auth-bypass"
      ],
      "cwe": [
        "CWE-807"
      ],
      "taxonomy": {
        "owasp_asi": [
          "ASI05",
          "ASI03"
        ],
        "atlas": [
          "AML.T0105"
        ]
      },
      "cveBoundary": "cve-aliased",
      "exploitation": {
        "status": "demonstrated",
        "checkedAt": "2026-09-24T00:00:00Z",
        "sources": [
          {
            "url": "https://www.ox.security/blog/cve-2026-82533-deepseek-harness-ai-agent-sandbox-escape/",
            "type": "research"
          }
        ],
        "kev": {
          "listed": false
        }
      },
      "fix": {
        "summary": "Upgrade DeepSeek Harness to 0.1.2-alpha.1 or later.",
        "actions": [
          {
            "type": "upgrade",
            "target": "harness:deepseek-harness",
            "to": "0.1.2-alpha.1",
            "why": "Remediation stated by OX Security.",
            "owner": "operator"
          }
        ]
      },
      "exposure": {
        "harness": {
          "value": "DeepSeek Harness (dsh) 0.1.1-rc.2 and earlier",
          "any": false,
          "status": "confirmed",
          "source": "https://www.ox.security/blog/cve-2026-82533-deepseek-harness-ai-agent-sandbox-escape/"
        },
        "model": {
          "value": "any",
          "any": true,
          "status": "unconfirmed"
        },
        "goal": {
          "value": "Any coding-agent task run inside the DeepSeek Harness sandbox",
          "stated": false,
          "status": "unconfirmed"
        },
        "tools": {
          "value": "The local agent-control API and the operating-system sandbox",
          "status": "confirmed",
          "source": "https://www.ox.security/blog/cve-2026-82533-deepseek-harness-ai-agent-sandbox-escape/"
        },
        "approval": {
          "value": "The agent-control API accepts the request without authenticating the caller",
          "mode": "none-required",
          "status": "confirmed",
          "source": "https://www.ox.security/blog/cve-2026-82533-deepseek-harness-ai-agent-sandbox-escape/"
        },
        "inputControl": "unknown",
        "agentAction": "The agent disables its sandbox and writes outside the session workspace.",
        "harm": "arbitrary-command",
        "divergence": "none",
        "reach": {
          "value": "Files outside the session workspace",
          "kinds": [
            "project-files"
          ],
          "status": "confirmed",
          "source": "https://www.ox.security/blog/cve-2026-82533-deepseek-harness-ai-agent-sandbox-escape/"
        }
      },
      "claims": [
        {
          "kind": "identifier",
          "statement": "Identifier CVE-2026-82533",
          "value": "CVE-2026-82533",
          "status": "confirmed",
          "source": "https://cveawg.mitre.org/api/cve/CVE-2026-82533",
          "result": "match",
          "observed": "CVE.org: PUBLISHED",
          "method": "machine",
          "checkedAt": "2026-09-24T18:58:25Z"
        },
        {
          "kind": "fixed-version",
          "statement": "Fixed in 0.1.2-alpha.1",
          "value": "0.1.2-alpha.1",
          "status": "confirmed",
          "source": "https://cveawg.mitre.org/api/cve/CVE-2026-82533",
          "result": "match",
          "observed": "CVE.org structured: lessThan 0.1.2-alpha.1; affected-version 0; CVE.org description: fixed 0.1.2-alpha.1",
          "method": "machine",
          "checkedAt": "2026-09-24T18:58:25Z"
        },
        {
          "kind": "severity",
          "statement": "Severity CRITICAL; matches CNA",
          "status": "confirmed",
          "source": "https://cveawg.mitre.org/api/cve/CVE-2026-82533",
          "observed": "CNA: CRITICAL 9.4 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H); CNA: CRITICAL 9.6 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H); OSV: (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H)",
          "result": "match",
          "method": "machine",
          "checkedAt": "2026-09-24T18:58:25Z"
        }
      ],
      "reproducibility": {
        "status": "partial",
        "axesComplete": true,
        "componentsObtainable": null,
        "triggerPublished": false,
        "observableStated": true,
        "demonstrated": "researcher-demonstrated",
        "missing": [
          "vulnerable components are not confirmed obtainable",
          "trigger not published"
        ]
      }
    }
  }
}