Waleed
c620fdccf0
* fix(chat): prevent XSS in attachment preview via filename/data URL escaping Replace document.write with an escaped blob URL preview: HTML-entity encode the user-controlled filename and data URL, open with noopener,noreferrer, and revoke the blob URL after navigation. * fix(mcp): guard OAuth discovery and token revocation against SSRF Route discoverOAuthServerInfo and the RFC 7009 revocation POST through an SSRF-guarded fetch that validates every request URL via validateMcpServerSsrf (blocking private/reserved/loopback targets, honoring ALLOWED_MCP_DOMAINS and self-hosted localhost rules) and pins the connection to the resolved IP to prevent DNS-rebinding TOCTOU. Previously these fetches used unvalidated global fetch against URLs taken verbatim from attacker-controllable authorization-server metadata. * fix(webhooks): verify Graph clientState on Teams chat-subscription notifications The microsoftteams_chat_subscription trigger set clientState=webhook.id when creating the Graph subscription but never validated it on inbound change notifications, so any request to the webhook path with a crafted notification body was treated as authentic (CWE-345). verifyAuth now requires every notification in the value array to carry a clientState matching the stored webhook id (constant-time compare) and rejects payloads without notifications. Validation handshakes (validationToken) are handled before auth and remain unaffected; outgoing-webhook HMAC auth is unchanged. * fix(webhooks): fail closed when Teams chat-subscription webhook id is unavailable Hardens the clientState check so a missing webhook id (theoretically unreachable, since the row is looked up by primary key) can never collapse the expected value to an empty string that a forged clientState could match. * docs(mcp): note AbortSignal does not bound SSRF-guard DNS lookup * improvement(chat): hoist HTML escape map to module-level constant
The open-source platform to build AI agents and run your agentic workforce. Connect 1,000+ integrations and LLMs to orchestrate agentic workflows.
Build Workflows with Ease
Design agent workflows visually on a canvas—connect agents, tools, and blocks, then run them instantly.
Supercharge with Copilot
Leverage Copilot to generate nodes, fix errors, and iterate on flows directly from natural language.
Integrate Vector Databases
Upload documents to a vector store and let agents answer questions grounded in your specific content.
Quickstart
Cloud-hosted: sim.ai
Self-hosted: NPM Package
npx simstudio
Note
Docker must be installed and running on your machine.
Options
| Flag | Description |
|---|---|
-p, --port <port> |
Port to run Sim on (default 3000) |
--no-pull |
Skip pulling latest Docker images |
Self-hosted: Docker Compose
git clone https://github.com/simstudioai/sim.git && cd sim
docker compose -f docker-compose.prod.yml up -d
Sim also supports local models via Ollama and vLLM — see the Docker self-hosting docs for setup details.
Self-hosted: Manual Setup
Requirements: Bun, Node.js v20+, PostgreSQL 12+ with pgvector
- Clone and install:
git clone https://github.com/simstudioai/sim.git
cd sim
bun install
bun run prepare # Set up pre-commit hooks
- Set up PostgreSQL with pgvector:
docker run --name simstudio-db -e POSTGRES_PASSWORD=your_password -e POSTGRES_DB=simstudio -p 5432:5432 -d pgvector/pgvector:pg17
Or install manually via the pgvector guide.
- Configure environment:
cp apps/sim/.env.example apps/sim/.env
# Create your secrets
perl -i -pe "s/your_encryption_key/$(openssl rand -hex 32)/" apps/sim/.env
perl -i -pe "s/your_internal_api_secret/$(openssl rand -hex 32)/" apps/sim/.env
perl -i -pe "s/your_api_encryption_key/$(openssl rand -hex 32)/" apps/sim/.env
# DB configs for migration
cp packages/db/.env.example packages/db/.env
# Edit both .env files to set DATABASE_URL="postgresql://postgres:your_password@localhost:5432/simstudio"
- Run migrations:
cd packages/db && bun run db:migrate
- Start development servers:
bun run dev:full # Starts Next.js app and realtime socket server
Or run separately: bun run dev (Next.js) and cd apps/sim && bun run dev:sockets (realtime).
Copilot API Keys
Copilot is a Sim-managed service. To use Copilot on a self-hosted instance:
- Go to https://sim.ai → Settings → Copilot and generate a Copilot API key
- Set
COPILOT_API_KEYenvironment variable in your self-hosted apps/sim/.env file to that value
Environment Variables
See the environment variables reference for the full list, or apps/sim/.env.example for defaults.
Tech Stack
- Framework: Next.js (App Router)
- Runtime: Bun
- Database: PostgreSQL with Drizzle ORM
- Authentication: Better Auth
- Schema Validation: Zod
- UI: Shadcn, Tailwind CSS
- Streaming Markdown: Streamdown
- State Management: Zustand, TanStack Query
- Flow Editor: ReactFlow
- Docs: Fumadocs
- Monorepo: Turborepo
- Realtime: Socket.io
- Background Jobs: Trigger.dev
- Remote Code Execution: E2B
- Isolated Code Execution: isolated-vm
Contributing
We welcome contributions! Please see our Contributing Guide for details.
License
This project is licensed under the Apache License 2.0 - see the LICENSE file for details.
Made with ❤️ by the Sim Team