CVE-2026-40156

In the multi-agent system PraisonAI prior to version 4.6.37, a vulnerability allows the exploitation of symlinks to write arbitrary data to a chosen location on the victim's filesystem. The issue stems from the lack of validation for member.linkname and not rejecting symlink/hardlink members.

In PraisonAI from version 4.2.1 to before 4.6.59, the AgentOS FastAPI deployment surface remains unauthenticated despite the earlier fix for CVE-2026-40151. The chat route directly calls agent.chat(request.message), and both no-auth and wrong-bearer requests execute the deployed agent.

In PraisonAI prior to praisonaiagents 1.6.59, AgentTeam.launch and the Agents alias register GET /{path}/list, POST /{path}, and POST /{path}/{agent_id} without access-control checks before listing agents or calling agent.chat. A remotely exposed server can therefore let unauthenticated clients enumerate agents, consume model resources, access connected private context, and trigger agent tools or workflow side effects.

PraisonAI prior to version 4.6.78 has a vulnerability in the `deploy/api.py` module that generates Python server code by directly interpolating the `agents_file` parameter into an f-string, which is then written to a file and executed via `subprocess.Popen()`. An attacker who controls the `agents_file` value can inject arbitrary Python code.

In PraisonAI prior to 0.1.6, when PLATFORM_JWT_SECRET is unset, the public dev-secret-change-me HS256 signing key is used, and startup and token-issuance guards are disabled because PLATFORM_ENV defaults to dev. An unauthenticated attacker can sign a JWT with an arbitrary sub value that is accepted as an authenticated identity, enabling impersonation of a user or workspace owner.

In PraisonAI prior to 0.1.6, when PLATFORM_JWT_SECRET is unset, JWT_SECRET is assigned the public dev-secret-change-me value, and its production guard does not run when PLATFORM_ENV is also unset (defaults to dev). A remote unauthenticated attacker can mint an HS256 token with arbitrary sub and email, which is accepted by AuthService._verify_token() and get_current_user for protected API routes.

In PraisonAI prior to 1.7.2, the codeMode tool in src/praisonai-ts/src/tools/builtins/code-mode.ts executes model-generated JavaScript with new Function() and with(sandbox), while a regex blocklist can be bypassed with Function('return this')() to recover the global object and by dynamically constructing the child_process module name. An attacker who can influence the code argument can access host process capabilities, read or write files, obtain environment credentials, and execute OS commands with PraisonAI process privileges.

In PraisonAI from 1.6.0 until 1.7.2, AgentOS in src/praisonai-ts/src/os/agentos.ts uses the 0.0.0.0 default from src/praisonai-ts/src/os/config.ts and registers GET /api/agents and POST /api/chat without authentication middleware. A remote caller who can reach the service can obtain agent names, roles, and instruction prefixes and can invoke a selected agent, potentially reaching its tools, memory, external APIs, credentials, and workflow state.

In PraisonAI from 1.5.0 until 1.7.2, MCPServer.startHttp() in src/praisonai-ts/src/mcp/server.ts binds without a host restriction and forwards every HTTP POST request to handleRequest() without authentication or authorization. Any network client that can reach the port can call tools/list, tools/call, resources/read, or prompts/get, causing registered handlers to run with server-side credentials and process privileges or disclose registered data.

In PraisonAI from 1.4.0 until 1.7.2, codeMode in src/praisonai-ts/src/tools/builtins/code-mode.ts executes untrusted JavaScript with new Function() inside with(sandbox) and relies on a small source-code blocklist plus shadowed process and require properties. Code can use ({}).constructor.constructor to recover the real Function constructor, obtain process and process.mainModule.require, and reach host filesystem and subprocess APIs despite the advertised sandbox. Attackers who control codeMode input can read secrets, modify files, execute commands, or exhaust the host process.