Is CVE-2026-47391 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-47391 being exploited in the wild.

How severe is CVE-2026-47391?

Critical severity, with a CVSS score of 9.8, published 21 July 2026.

Which products and versions are affected?

praisonai (PyPI) ECOSYSTEM:introduced=0,fixed=4.6.40.

Is there a fix for CVE-2026-47391?

Yes. praisonai (PyPI): upgrade to 4.6.40 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-47391 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-47391?

Check whether you run praisonai (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-47391: MervinPraison PraisonAI remote code execution in A2A server example

CVE-2026-47391 · Severity: critical · CVSS 9.8 · Published 2026-07-21

PraisonAI, a system for managing multi-agent AI teams, contained a critical security flaw in its official server examples. An attacker could remotely execute their own code on the server without needing a password by sending a specially crafted message that triggers an unsafe calculation tool. This could allow an unauthorized user to take full control of the server, access sensitive data, or disrupt AI operations.

Technologies: praisonai (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2026-47391 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-47391 being exploited in the wild.
How severe is CVE-2026-47391?: Critical severity, with a CVSS score of 9.8, published 21 July 2026.
Which products and versions are affected?: praisonai (PyPI) ECOSYSTEM:introduced=0,fixed=4.6.40.
Is there a fix for CVE-2026-47391?: Yes. praisonai (PyPI): upgrade to 4.6.40 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-47391 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-47391?: Check whether you run praisonai (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

praisonai (PyPI): upgrade to 4.6.40 or later
```
pip install "praisonai>=4.6.40"
```

Technical details

The vulnerability arises from a combination of missing authentication in the Agent-to-Agent (A2A) JSON-RPC endpoint and the use of Python's `eval()` function in a registered `calculate(expression)` tool. In the official A2A server example, the server binds to `0.0.0.0` without an `auth_token`. A remote, unauthenticated attacker can send a `message/send` request to the `/a2a` endpoint; the system passes this input to `agent.chat()`, where a Large Language Model (LLM) may invoke the `calculate` tool using attacker-supplied strings. This results in arbitrary Python execution within the server process. The issue was addressed in version 4.6.40 by replacing `eval()` with an AST-based safe evaluator and hardening default authentication settings.

Affected products

MervinPraison PraisonAI < 4.6.40

Identifiers

CVE-2026-47391
GHSA-vg22-4gmj-prxw
PYSEC-2026-478

Timeline

2026-05-19: advisory: Initial GitHub security advisory published
2026-06-02: patched: Fix merged into main branch via PR #1793
2026-07-21: disclosed: CVE-2026-47391 published to NVD

References

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