CVE-2026-39305 Arbitrary File Write / Path Traversal in Action Orchestrator
Attackers can write arbitrary files outside the workspace via path traversal in PraisonAI, potentially overwriting system files or executing code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-39305?
CVE-2026-39305 is a critical path traversal vulnerability in MervinPraison PraisonAI, published on 7 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-22
Which versions are affected by CVE-2026-39305?
3 open source packages ship an affected version, including praisonai and PraisonAI. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
praisonai PyPI | All versions | 4.5.113 |
praisonai PyPI | All versions | 4.5.113 |
PraisonAI PyPI | All versions | 4.5.113 |
Products include Praison Praisonai.
How do I fix CVE-2026-39305?
Upgrade praisonai to 4.5.113 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-39305 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-39305 exists.
Other vulnerabilities in MervinPraison PraisonAI
- CVE-2026-39888 PraisonAIAgents has a sandbox escape via exception frame traversal in `execute_code` (subprocess mode)
- CVE-2026-41497 Incomplete fix for CVE-2026-34935: Command Injection in MervinPraison/PraisonAI
- CVE-2026-40288 PraisonAI: Critical RCE via `type: job` workflow YAML
- CVE-2026-39890 PraisonAI Affected by Remote Code Execution via YAML Deserialization in Agent Definition Loading
- CVE-2026-34934 PraisonAI: Second-Order SQL Injection in `get_all_user_threads`
Sources
Also known as GHSA-jfxc-v5g9-38xr, PYSEC-2026-475.