CVE-2026-39305 — praisonai
CRITICALCVE-2026-39305 is a critical-severity (CVSS 9) Path Traversal vulnerability in praisonai. A fix is available for praisonai — see the affected versions and patch details below.
Arbitrary File Write / Path Traversal in Action Orchestrator
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
- A successful exploit gives an attacker total control of the affected component, not partial access.
Exploitation and automatability from CISA’s SSVC triage for CVE-2026-39305.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
praisonaiReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.
Description
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:
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.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | praisonai | all versions | 4.5.113pip install --upgrade 'praisonai==4.5.113' |
Affected Products
praisonaipraisonDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for praisonai, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update praisonai to 4.5.113 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-39305 is resolved across your whole dependency graph.
Workarounds
Resolve every user-supplied path to its canonical form and reject anything that escapes the intended directory, and run the component under an account that has no read or write access outside the directory it legitimately serves.
Frequently Asked Questions
Is CVE-2026-39305 in your dependencies?
Find it across PyPI, including transitive dependencies.