---
id: GHSA-5866-9272-qcfv
title: >-
  Duplicate Advisory: PraisonAI: MCP HTTP-stream transport is unauthenticated by
  default, exposing tool enumeration and an unvalidated tool-call surface
summary: >-
  Duplicate Advisory: PraisonAI: MCP HTTP-stream transport is unauthenticated by
  default, exposing tool enumeration and an unvalidated tool-call surface
severity: medium
cvss: 7.3
cwe:
  - CWE-20
vendor: praisonai
product: praisonai
ecosystem: pip
affected:
  - praisonai <= 4.6.77
published: '2026-07-15'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T21:58:36Z'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-5866-9272-qcfv'
references:
  - url: >-
      https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-hc5v-gxvj-58wh
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-61427'
  - url: >-
      https://www.vulncheck.com/advisories/praisonai-before-authentication-bypass-via-http-stream
  - url: 'https://github.com/advisories/GHSA-5866-9272-qcfv'
tags:
  - ghsa
  - pip
ingestedAt: '2026-10-08T22:11:53.879Z'
---

## Overview

### Duplicate Advisory
This advisory has been withdrawn because it is a duplicate of GHSA-hc5v-gxvj-58wh. This link is maintained to preserve external references.

### Original Description
PraisonAI before 4.6.78 exposes the MCP HTTP-stream transport without authentication by default: the CLI --api-key option defaults to None, and the server only enforces Authorization/Bearer checks when an API key is configured. When an operator runs 'praisonai mcp serve --transport http-stream' without an API key, an unauthenticated client (no Authorization header, and no Origin header, which is also permitted) can initialize a session, enumerate the available tools (tools/list), and invoke tools (tools/call). Additionally, the dispatcher forwards tool-call arguments to handlers without validating them against the advertised inputSchema. The server binds to 127.0.0.1 by default, so remote exploitation requires the operator to bind to a network-accessible address (e.g., --host 0.0.0.0).

## Affected packages

- `praisonai <= 4.6.77`

## Remediation

Refer to the advisory for the patched release.