PraisonAI is a multi-agent teams system. Prior to 4.5.128, PraisonAI treats remotely fetched template files as trusted executable code without integrity verification, origin validation, or user confirmation, enabling supply chain attacks through malicious templates. This vulnerability is fixed in 4.5.128.

Affected: PyPI: PraisonAI

PraisonAI treats remotely fetched template files as trusted executable code without integrity verification, origin validation, or user confirmation, enabling supply chain attacks through malicious templates.

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## Description

When a user installs a template from a remote source (e.g., GitHub), PraisonAI downloads Python files (including `tools.py`) to a local cache without:

1. Code signing verification 2. Integrity checksum validation 3. Dangerous code pattern scanning 4. User confirmation before execution

When the template is subsequently used, the cached `tools.py` is automatically loaded and executed via `exec_module()`, granting the template's code full access to the user's environment, filesystem, and network.

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## Affected Code

**Template download (no verification):** ```python # templates/registry.py:135-151 def fetch_github_template(owner, repo, template_path, ref="main"): temp_dir = Path(tempfile.mkdtemp(prefix="praison_template_")) for item in contents: if item["type"] == "file": file_content = self._fetch_github_file(item["download_url"]) file_path = temp_dir / item["name"] file_path.write_bytes(file_content) # No verification performed ```

**Automatic execution (no confirmation):** ```python # tool_resolver.py:74-80 spec = importlib.util.spec_from_file_location("tools", str(tools_path)) module = importlib.util.module_from_spec(spec) spec.loader.exec_module(module) # Executes without user con…

Affected: PyPI: praisonai

PraisonAI treats remotely fetched template files as trusted executable code without integrity verification, origin validation, or user confirmation, enabling supply chain attacks through malicious templates.

---

## Description

When a user installs a template from a remote source (e.g., GitHub), PraisonAI downloads Python files (including `tools.py`) to a local cache without:

1. Code signing verification 2. Integrity checksum validation 3. Dangerous code pattern scanning 4. User confirmation before execution

When the template is subsequently used, the cached `tools.py` is automatically loaded and executed via `exec_module()`, granting the template's code full access to the user's environment, filesystem, and network.

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## Affected Code

**Template download (no verification):** ```python # templates/registry.py:135-151 def fetch_github_template(owner, repo, template_path, ref="main"): temp_dir = Path(tempfile.mkdtemp(prefix="praison_template_")) for item in contents: if item["type"] == "file": file_content = self._fetch_github_file(item["download_url"]) file_path = temp_dir / item["name"] file_path.write_bytes(file_content) # No verification performed ```

**Automatic execution (no confirmation):** ```python # tool_resolver.py:74-80 spec = importlib.util.spec_from_file_location("tools", str(tools_path)) module = importlib.util.module_from_spec(spec) spec.loader.exec_module(module) # Executes without user…