---
title: "CVE-2026-40154: PraisonAI Vulnerable Untrusted Remote Template Code Execution"
url: https://erroneo.us/security/cve/CVE-2026-40154/
description: "CVE-2026-40154 (PraisonAI (PyPI)): PraisonAI is a multi-agent teams system. Prior to 4.5.128, PraisonAI treats remotely fetched template files as trusted…"
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-2026-40154"
kev: false
cvss: 9.3
epss: 0.00457
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-40154: PraisonAI Vulnerable Untrusted Remote Template Code Execution

**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 0.5% , percentile 39: FIRST’s model estimates a 0.5% chance of exploitation activity in the next 30 days, higher than 39% 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) < 4.5.128, fixed in 4.5.128 . Check your lockfile, including transitive dependencies.

## What it is

PraisonAI is a multi-agent teams system. Prior to 4.5.128, PraisonAI treats remotely fetched template files as trusted executable code without integrity verification, origin validation, or user confirmation, enabling supply chain attacks through malicious templates. This vulnerability is fixed in 4.5.128.

## Affected packages

- PyPI `PraisonAI` < 4.5.128 → fixed: 4.5.128

## Affected products (CVE record)

- MervinPraison PraisonAI: < 4.5.128

## Severity

- GitHub_M CVSS 3.1: 9.3 `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N`
- GitHub CVSS 3.1: 9.3 `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N`

## 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): 0.46% probability of exploitation activity in the next 30 days; percentile 39.

## Sources

- [GitHub Advisory GHSA-pv9q-275h-rh7x](https://github.com/advisories/GHSA-pv9q-275h-rh7x)
- [CVE.org record CVE-2026-40154](https://www.cve.org/CVERecord?id=CVE-2026-40154)
- [NVD entry CVE-2026-40154](https://nvd.nist.gov/vuln/detail/CVE-2026-40154)
- [github.com](https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-pv9q-275h-rh7x)
- [github.com](https://github.com/MervinPraison/PraisonAI/releases/tag/v4.5.128)

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Source page: https://erroneo.us/security/cve/CVE-2026-40154/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt