CVE-2026-39307 PraisonAI has an Arbitrary File Write (Zip Slip) in Templates Extraction
Attackers can write arbitrary files outside the intended directory via malicious template archives, potentially leading to code execution or data modification.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-39307?
CVE-2026-39307 is a high-severity path traversal vulnerability in MervinPraison PraisonAI, published on 7 Apr 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
PraisonAI is a multi-agent teams system. Prior to 1.5.113, The PraisonAI templates installation feature is vulnerable to a "Zip Slip" Arbitrary File Write attack. When downloading and extracting template archives from external sources (e.g., GitHub), the application uses Python's zipfile.extractall() without verifying if the files within the archive resolve outside of the intended extraction directory. This vulnerability is fixed in 1.5.113.
Weakness: CWE-22
Which versions are affected by CVE-2026-39307?
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-2026-39307?
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-2026-39307 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-39307 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-4ph2-f6pf-79wv, PYSEC-2026-2899.