---
title: "CVE-2026-40088: PraisonAI Vulnerable to OS Command Injection"
url: https://erroneo.us/security/cve/CVE-2026-40088/
description: "CVE-2026-40088 (PraisonAI (PyPI)): PraisonAI is a multi-agent teams system. Prior to 4.5.121, the executecommand function and workflow shell execution are…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-04-09
date_modified: 2026-04-10
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-40088"
kev: false
cvss: 9.7
epss: 0.00597
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-40088: PraisonAI Vulnerable to OS Command Injection

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.6% , percentile 48: FIRST’s model estimates a 0.6% chance of exploitation activity in the next 30 days, higher than 48% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Needs a user to click or open something. Phishing makes that realistic, but it is not wormable.
- Only applies if your dependency tree includes PraisonAI (PyPI) < 4.5.121, fixed in 4.5.121 . Check your lockfile, including transitive dependencies.

## What it is

PraisonAI is a multi-agent teams system. Prior to 4.5.121, the executecommand function and workflow shell execution are exposed to user-controlled input via agent workflows, YAML definitions, and LLM-generated tool calls, allowing attackers to inject arbitrary shell commands through shell metacharacters. This vulnerability is fixed in 4.5.121.

## Affected packages

- PyPI `PraisonAI` < 4.5.121 → fixed: 4.5.121

## Affected products (CVE record)

- MervinPraison PraisonAI: < 4.5.121

## Severity

- GitHub_M CVSS 3.1: 9.7 `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.6 `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.60% probability of exploitation activity in the next 30 days; percentile 48.

## Sources

- [GitHub Advisory GHSA-2763-cj5r-c79m](https://github.com/advisories/GHSA-2763-cj5r-c79m)
- [CVE.org record CVE-2026-40088](https://www.cve.org/CVERecord?id=CVE-2026-40088)
- [NVD entry CVE-2026-40088](https://nvd.nist.gov/vuln/detail/CVE-2026-40088)
- [github.com](https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-2763-cj5r-c79m)
- [github.com](https://github.com/MervinPraison/PraisonAI/releases/tag/v4.5.121)

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Source page: https://erroneo.us/security/cve/CVE-2026-40088/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt