CVE-2026-39305 — Arbitrary File Write / Path Traversal in Action Orchestrator

Affected: MervinPraison PraisonAI

PraisonAI is a multi-agent teams system. Prior to 1.5.113, the Action Orchestrator feature contains a Path Traversal vulnerability that allows an attacker (or compromised agent) to write to arbitrary files outside of the configured workspace directory. By supplying relative path segments (../) in the target path, malicious actions can overwrite sensitive system files or drop executable payloads on the host. This vulnerability is fixed in 1.5.113.

PYSEC-2026-475 — PraisonAI Vulnerable to Arbitrary File Write / Path Traversal in Action Orchestrator

Affected: PyPI: praisonai

The Action Orchestrator feature contains a Path Traversal vulnerability that allows an attacker (or compromised agent) to write to arbitrary files outside of the configured workspace directory. By supplying relative path segments (`../`) in the target path, malicious actions can overwrite sensitive system files or drop executable payloads on the host.

### Details Location: `src/praisonai/praisonai/cli/features/action_orchestrator.py` (Lines 402, 409, 423)

Vulnerable Code snippet: ```python target = workspace / step.target ```

In the `_apply_step` method, paths are constructed by concatenating the `workspace` path with a user-supplied `step.target` string: `target = workspace / step.target`. The code fails to resolve and validate that the final absolute path remains within the bounds of the `workspace` directory. When processing `FILE_CREATE` or `FILE_EDIT` actions, this flaw permits arbitrary file modification.

### PoC Construct a malicious `ActionStep` payload with path traversal characters:

```python from praisonai.cli.features.action_orchestrator import ActionStep, ActionType, ActionStatus # Payload targeting a file outside the workspace step = ActionStep( id="test_traversal", action_type=ActionType.FILE_CREATE, description="Malicious file write", target="../../../../../../../tmp/orchestrator_pwned.txt", params={"content": "pwned"}, status=ActionStatus.APPROVED )

# When the orchestrator applies this step, it writes to the traversed path #…

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CVE-2026-39305 — Arbitrary File Write / Path Traversal in Action Orchestrator

PYSEC-2026-475 — PraisonAI Vulnerable to Arbitrary File Write / Path Traversal in Action Orchestrator