CVE-2026-57116: PraisonAI AgentOS Remains Unauthenticated After Incomplete Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-892r-p3jq-jp24",
  "modified" : "2026-07-20T21:24:12Z",
  "published" : "2026-06-18T13:57:47Z",
  "aliases" : [ "CVE-2026-57116" ],
  "summary" : "PraisonAI: AgentOS remains unauthenticated after incomplete fix version and allows remote agent invocation",
  "details" : "# AgentOS remains unauthenticated after GHSA-pm96 patched version and allows remote agent invocation\n\n## Summary\n\nPraisonAI's `AgentOS` FastAPI deployment surface remains unauthenticated in\ncurrent main and in releases after the published patched version for\n`GHSA-pm96-6xpr-978x` / `CVE-2026-40151`.\n\nThe public AgentOS advisory is published as an instruction-disclosure issue\nwith affected versions `< 4.5.128` and patched version `4.5.128`. However,\n`v4.5.128`, latest release `v4.6.57`, and current main still register\n`GET /api/agents` and `POST /api/chat` without authentication. The chat route\ndirectly calls `agent.chat(request.message)`. No-auth and wrong-bearer requests\nboth execute the deployed agent.\n\nThis is broader than passive metadata disclosure. In any deployment where\nAgentOS wraps agents with tools, private context, memory, API integrations, or\ncost-bearing model calls, an unauthenticated reachable client can drive those\nagents.\n\n## Affected Product\n\n- Repository: `MervinPraison/PraisonAI`\n- Package: `praisonai`\n- Component: `src/praisonai/praisonai/app/agentos.py`\n- Config component: `src/praisonai-agents/praisonaiagents/app/config.py`\n- Public advisory incomplete-fix reference: `GHSA-pm96-6xpr-978x` /\n  `CVE-2026-40151`\n\nConfirmed affected dynamically:\n\n- `v4.5.126`\n- `v4.5.128` (published patched version for `GHSA-pm96-6xpr-978x`)\n- `v4.6.9`\n- `v4.6.10`\n- `v4.6.56`\n- `v4.6.57`\n- current main `2f9677abb2ea68eab864ee8b6a828fd0141612e1`\n\nStatic source review found the same unauthenticated route pattern and\n`0.0.0.0` default in `v4.2.1`.\n\nSuggested affected range: `>= 4.2.1, <= 4.6.57`.\n\n## Root Cause\n\n`AgentOSConfig` / `AgentAppConfig` defaults the deployment host to all\ninterfaces and has no authentication fields:\n\n```python\nname: str = \"PraisonAI App\"\nhost: str = \"0.0.0.0\"\nport: int = 8000\napi_prefix: str = \"/api\"\n```\n\n`AgentOS._register_routes()` registers public agent metadata and chat routes\nwithout middleware, dependency, API key check, bearer-token check, or startup\nfail-closed guard:\n\n```python\n@app.get(f\"{self.config.api_prefix}/agents\")\nasync def list_agents():\n    return {\"agents\": [...]}\n\n@app.post(f\"{self.config.api_prefix}/chat\", response_model=ChatResponse)\nasync def chat(request: ChatRequest):\n    ...\n    response = agent.chat(request.message)\n```\n\nA wrong `Authorization` header is ignored because the route does not inspect it.\n\nCurrent main also has a root-export bug where `from praisonai import AgentOS`\nraises `ImportError`, but this does not mitigate the issue. The same class\nremains reachable through `from praisonai import AgentApp` and\n`from praisonai.app import AgentOS`.\n\n## Why This Is Not Intended Behavior\n\nPraisonAI's security documentation says API servers were hardened so anonymous\nrequests return `401` and default binding changed from `0.0.0.0` to\n`127.0.0.1` after the prior unauthenticated API server class.\n\nThe API Server Authentication docs say bearer auth is enabled by default,\ndisabling auth is not recommended for production, and `0.0.0.0` should be used\nonly behind an authenticating proxy.\n\nThe local PoV includes a hardened sibling control for the generated deploy API\non current main. It returns:\n\n- no auth: `401`\n- wrong bearer: `401`\n- correct bearer: `200`\n\nAgentOS remains outside that control plane and still accepts no-auth and\nwrong-bearer `/api/chat` requests.\n\n## Local PoV\n\nThe PoV is local-only. It uses FastAPI's in-process test client, a stub agent,\nand a temporary file side effect. It does not start a network listener, call an\nLLM provider, or contact any external service.\n\nCommand:\n\n```bash\nenv PYTHONPATH=\"artifacts/repos/praisonai-current/src/praisonai:artifacts/repos/praisonai-current/src/praisonai-agents\" \\\n  uv run --with fastapi --with httpx --with flask --with flask-cors \\\n    --with pydantic --with typing-extensions --with rich --with python-dotenv \\\n    submission-bundle/praisonai-prai-cand-007-agentos-incomplete-auth-fix/poc/prai_cand_007_agentos_incomplete_auth_fix.py \\\n    --repo artifacts/repos/praisonai-current \\\n    --label current-head\n```\n\nCurrent-head result summary:\n\n```json\n{\n  \"describe\": \"v4.6.57-4-g2f9677ab\",\n  \"head\": \"2f9677abb2ea68eab864ee8b6a828fd0141612e1\",\n  \"agentos_vulnerable\": true,\n  \"entrypoints\": [\n    {\n      \"entrypoint\": \"agentapp_alias\",\n      \"statuses\": [200, 200, 200],\n      \"side_effects\": [\"no-auth-marker\", \"wrong-bearer-marker\"]\n    },\n    {\n      \"entrypoint\": \"direct_agentos\",\n      \"statuses\": [200, 200, 200],\n      \"side_effects\": [\"no-auth-marker\", \"wrong-bearer-marker\"]\n    }\n  ],\n  \"deploy_api_control\": {\n    \"control_passed\": true,\n    \"statuses\": [401, 401, 200]\n  }\n}\n```\n\nThe three AgentOS statuses are for:\n\n- unauthenticated `GET /api/agents`;\n- unauthenticated `POST /api/chat`;\n- wrong-bearer `POST /api/chat`.\n\nThe side-effect list proves both unauthenticated chat requests invoked the\nagent method.\n\nMinimal inline reproducer:\n\n```python\nfrom pathlib import Path\nfrom tempfile import TemporaryDirectory\n\nfrom fastapi.testclient import TestClient\nfrom praisonai import AgentApp\nfrom praisonaiagents import AgentOSConfig\n\nclass StubAgent:\n    name = \"pov_agentos_agent\"\n    role = \"tester\"\n    instructions = \"private instruction marker\"\n\n    def __init__(self, out):\n        self.out = out\n\n    def chat(self, message):\n        self.out.write_text(self.out.read_text() + message + \"\\n\")\n        return \"PRAI_CAND_007_AGENTOS_EXECUTED:\" + message\n\nwith TemporaryDirectory() as tmp:\n    side_effect = Path(tmp) / \"side_effects.txt\"\n    side_effect.write_text(\"\")\n    app = AgentApp(\n        agents=[StubAgent(side_effect)],\n        config=AgentOSConfig(host=\"0.0.0.0\", port=8000),\n    )\n    client = TestClient(app.get_app())\n\n    assert client.get(\"/api/agents\").status_code == 200\n    assert client.post(\"/api/chat\", json={\"message\": \"no-auth\"}).status_code == 200\n    assert client.post(\n        \"/api/chat\",\n        headers={\"Authorization\": \"Bearer definitely-wrong\"},\n        json={\"message\": \"wrong-bearer\"},\n    ).status_code == 200\n    assert side_effect.read_text().splitlines() == [\"no-auth\", \"wrong-bearer\"]\n```\n\n## Version Sweep\n\n| Target | Result |\n| --- | --- |\n| `v4.5.126` | vulnerable |\n| `v4.5.128` | vulnerable |\n| `v4.6.9` | vulnerable |\n| `v4.6.10` | vulnerable |\n| `v4.6.56` | vulnerable; generated deploy API control returns `401/401/200` |\n| `v4.6.57` | vulnerable; generated deploy API control returns `401/401/200` |\n| current `2f9677abb` | vulnerable; generated deploy API control returns `401/401/200` |\n\nEvidence files are retained locally under the bundle's `evidence/` directory\nand can be provided if useful.\n\n## Duplicate / Incomplete-Fix Notes\n\nThis report is related to `GHSA-pm96-6xpr-978x` / `CVE-2026-40151`. The\npublished advisory describes AgentOS instruction disclosure and lists\n`4.5.128` as patched. It also mentions unauthenticated `/api/chat` as a chained\ninstruction-extraction path.\n\nThe current report should be treated as an incomplete fix / affected-range\ncorrection with a broader demonstrated impact:\n\n- the published patched version `v4.5.128` still reproduces;\n- latest release `v4.6.57` still reproduces;\n- current main still reproduces;\n- the PoV proves unauthorized agent invocation and side effects, not only\n  instruction disclosure.\n\nThis is distinct from private `PRAI-CAND-003` / `GHSA-x8cv-xmq7-p8xp`, which\ncovers `praisonaiagents.AgentTeam.launch()` routes. This report covers\n`praisonai.app.AgentOS` and `AgentApp` alias routes.\n\n## Impact\n\nIf an operator exposes an AgentOS app on a reachable interface, any client that\ncan reach it can:\n\n- enumerate deployed agents through `GET /api/agents`;\n- read agent names, roles, and instruction snippets;\n- invoke the default agent or a named agent through `POST /api/chat`;\n- trigger downstream tools, private context reads, memory accesses, API\n  integrations, browser actions, or other side effects attached to the agent;\n- consume model/API budget through repeated invocation.\n\nThe exact downstream impact depends on the deployed agents. The framework-level\nboundary failure is that a production deployment surface exposes agent control\nwithout authentication and defaults to binding on all interfaces.\n\n## Suggested Fix\n\nUse the same security model already applied to generated API deployments:\n\n- add authentication fields to `AgentOSConfig` / `AgentAppConfig`;\n- default auth to enabled;\n- default bind host to `127.0.0.1`;\n- reject no-auth and wrong-bearer requests for `GET /api/agents` and\n  `POST /api/chat`;\n- fail closed for non-loopback binds unless auth is configured or an explicit\n  unsafe development opt-out is set;\n- avoid returning instruction text from unauthenticated metadata endpoints;\n- add regression tests for no auth, wrong bearer, correct bearer, and external\n  bind without auth.\n\nMaintainers can either update `GHSA-pm96-6xpr-978x` with the corrected affected\nrange and broader impact or publish a separate incomplete-fix advisory.\n\n## Suggested Severity\n\nSuggested severity: Critical.\n\nThe Critical score matches the unauthenticated agent-control model: network\nattacker, low complexity, no privileges, no user interaction, and high\ndeployment-dependent impact when agents are connected to tools, private data,\nor cost-bearing services. If maintainers score only a minimal no-tool demo\nagent, the impact may be lower, but the current default framework behavior is\nstill unauthenticated agent invocation.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "praisonai"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.2.1"
      }, {
        "fixed" : "4.6.59"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 4.6.57"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-892r-p3jq-jp24"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/MervinPraison/PraisonAI"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200", "CWE-306", "CWE-862" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-18T13:57:47Z",
    "nvd_published_at" : null
  }
}