---
title: "CVE-2026-57139: npm PraisonAI MCPServer exposes unauthenticated HTTP tools/call"
url: https://erroneo.us/security/cve/CVE-2026-57139/
description: "CVE-2026-57139 (praisonai (npm)): PraisonAI is a multi-agent teams system. From 1.5.0 until 1.7.2, MCPServer.startHttp() in…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-09-15
date_modified: 2026-09-17
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-57139"
kev: false
cvss: 9.8
epss: 0.00754
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-57139: npm PraisonAI MCPServer exposes unauthenticated HTTP tools/call

**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 0.8% , percentile 55: FIRST’s model estimates a 0.8% chance of exploitation activity in the next 30 days, higher than 55% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes praisonai (npm) >= 1.5.0, <= 1.7.1, fixed in 1.7.2 . Check your lockfile, including transitive dependencies.

## What it is

PraisonAI is a multi-agent teams system. From 1.5.0 until 1.7.2, MCPServer.startHttp() in src/praisonai-ts/src/mcp/server.ts binds without a host restriction and forwards every HTTP POST request to handleRequest() without authentication or authorization. Any network client that can reach the port can call tools/list, tools/call, resources/read, or prompts/get, causing registered handlers to run with server-side credentials and process privileges or disclose registered data. An initial remediation was released in version 1.7.2.

## Affected packages

- npm `praisonai` >= 1.5.0, <= 1.7.1 → fixed: 1.7.2

## Affected products (CVE record)

- MervinPraison PraisonAI: >= 1.5.0, < 1.7.2

## Severity

- GitHub_M CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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 yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.75% probability of exploitation activity in the next 30 days; percentile 55.

## Sources

- [GitHub Advisory GHSA-j4f3-55x4-r6q2](https://github.com/advisories/GHSA-j4f3-55x4-r6q2)
- [CVE.org record CVE-2026-57139](https://www.cve.org/CVERecord?id=CVE-2026-57139)
- [NVD entry CVE-2026-57139](https://nvd.nist.gov/vuln/detail/CVE-2026-57139)
- [github.com](https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-j4f3-55x4-r6q2)
- [github.com](https://github.com/MervinPraison/PraisonAI/commit/709a0387853709a5e2f2c34680fa64cada252c27)
- [github.com](https://github.com/MervinPraison/PraisonAI/releases/tag/v4.6.60)

---
Source page: https://erroneo.us/security/cve/CVE-2026-57139/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt