Detections
Analytics

SCA: security update for PraisonAI (GHSA-vg22-4gmj-prxw)

critical Tenable Cloud Security Plugin ID 442518

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - PraisonAI is a multi-agent teams system. Prior to version 4.6.40, PraisonAI's first-party A2A server
 example exposes an unauthenticated A2A JSON-RPC endpoint and registers a `calculate(expression)` tool
 implemented with Python `eval()`. The example also binds to `0.0.0.0`. A remote unauthenticated attacker
 can send `message/send` to `/a2a`; the request reaches `agent.chat()`, and a real LLM can invoke the
 registered `calculate` tool. In testing with `gemini/gemini-2.5-flash-lite`, this resulted in arbitrary
 Python execution in the server process, confirmed by creation of a marker file from an unauthenticated
 HTTP request. The issue affects deployments following the official A2A example or similar unauthenticated
 public A2A deployments with unsafe tools. The default unauthenticated A2A surface also exposes task
 history and task cancellation APIs, increasing confidentiality and integrity impact. Version 4.6.40
 patches the issue. (CVE-2026-47391)

Solution

Update the PraisonAI library and its related packages to version 4.6.40 or later.

See Also

https://github.com/advisories/GHSA-vg22-4gmj-prxw

Plugin Details

Severity: Critical

ID: 442518

Version: Revision 1.5

Type: Local

Family: SCA Checks

Published: 5/30/2026

Updated: 7/22/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.12

Vendor

Vendor Severity: Critical

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-47391

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 5/29/2026

Vulnerability Publication Date: 5/29/2026

Reference Information

CVE: CVE-2026-47391