PYSEC-2026-475
Vulnerability from pysec - Published: 2026-06-29 11:50 - Updated: 2026-06-29 12:05
VLAI
Details
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:
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
_apply_step(step)
```
Impact
This is an Arbitrary File Write vulnerability. Anyone running the Action Orchestrator to apply modifications is vulnerable. A malicious prompt could trick the agent into generating a plan that overwrites critical files (e.g., ~/.ssh/authorized_keys, .bashrc) leading to Remote Code Execution (RCE) or system corruption.
Severity
9.0 (Critical)
Impacted products
| Name | purl | praisonai |
|---|
Aliases
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 4.5.112"
},
"package": {
"ecosystem": "PyPI",
"name": "praisonai"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.5.113"
}
],
"type": "ECOSYSTEM"
}
],
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}
],
"aliases": [
"CVE-2026-39305",
"GHSA-jfxc-v5g9-38xr"
],
"details": "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.\n\n### Details\nLocation: `src/praisonai/praisonai/cli/features/action_orchestrator.py` (Lines 402, 409, 423)\n\nVulnerable Code snippet:\n```python\ntarget = workspace / step.target\n```\n\nIn 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.\n\n### PoC\n Construct a malicious `ActionStep` payload with path traversal characters:\n\n```python\n from praisonai.cli.features.action_orchestrator import ActionStep, ActionType, ActionStatus\n \n# Payload targeting a file outside the workspace\nstep = ActionStep(\n id=\"test_traversal\",\n action_type=ActionType.FILE_CREATE,\n description=\"Malicious file write\",\n target=\"../../../../../../../tmp/orchestrator_pwned.txt\",\n params={\"content\": \"pwned\"},\n status=ActionStatus.APPROVED\n)\n\n# When the orchestrator applies this step, it writes to the traversed path\n# _apply_step(step)\n ```\n\n### Impact\nThis is an Arbitrary File Write vulnerability. Anyone running the Action Orchestrator to apply modifications is vulnerable. A malicious prompt could trick the agent into generating a plan that overwrites critical files (e.g., `~/.ssh/authorized_keys`, `.bashrc`) leading to Remote Code Execution (RCE) or system corruption.",
"id": "PYSEC-2026-475",
"modified": "2026-06-29T12:05:42.911617Z",
"published": "2026-06-29T11:50:45.794860Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-jfxc-v5g9-38xr"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39305"
},
{
"type": "PACKAGE",
"url": "https://github.com/MervinPraison/PraisonAI"
},
{
"type": "WEB",
"url": "https://github.com/MervinPraison/PraisonAI/releases/tag/v4.5.113"
},
{
"type": "PACKAGE",
"url": "https://pypi.org/project/praisonai"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-jfxc-v5g9-38xr"
}
],
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "PraisonAI Vulnerable to Arbitrary File Write / Path Traversal in Action Orchestrator"
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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