---
id: CVE-2026-49405
title: >-
  OpenHuman: Unauthenticated server-sent events endpoint leaks user-facing event
  data
summary: >-
  OpenHuman is an open-source agent harness available as a desktop application
  and Rust library. Before 0.56.0, the local server exposes the server-sent
  events endpoint at /events without bearer authentication, permits cross-origin
  browser…
severity: medium
cvss: 6.2
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-200
  - CWE-306
vendor: tinyhumansai
product: openhuman
affected:
  - openhuman < 0.56.0
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T18:22:58.818676Z'
exploitAvailable: true
published: '2026-11-05'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T18:23:34.573Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-49405'
references:
  - url: >-
      https://github.com/tinyhumansai/openhuman/security/advisories/GHSA-4c8x-994p-6x9v
    label: >-
      https://github.com/tinyhumansai/openhuman/security/advisories/GHSA-4c8x-994p-6x9v
  - url: 'https://github.com/tinyhumansai/openhuman/pull/2331'
    label: 'https://github.com/tinyhumansai/openhuman/pull/2331'
  - url: >-
      https://github.com/tinyhumansai/openhuman/commit/b1bbc53fceed7d1f0cff90cbb0a42f4ab8e153a1
    label: >-
      https://github.com/tinyhumansai/openhuman/commit/b1bbc53fceed7d1f0cff90cbb0a42f4ab8e153a1
  - url: 'https://github.com/tinyhumansai/openhuman/releases/tag/v0.56.0'
    label: 'https://github.com/tinyhumansai/openhuman/releases/tag/v0.56.0'
tags:
  - cve.org
  - exploit-available
ingestedAt: '2026-11-05T22:38:31.464Z'
---

## Overview

OpenHuman is an open-source agent harness available as a desktop application and Rust library. Before 0.56.0, the local server exposes the server-sent events endpoint at /events without bearer authentication, permits cross-origin browser access, and uses only a caller-supplied client_id to select WebChannelEvent objects from the process-wide event bus. An unauthenticated local client, or an attacker-hosted web page opened by the victim, can subscribe to another client's stream by supplying a known or guessed identifier; the fixed system identifier makes the proactive-message stream predictable. The exposed events can include complete assistant responses, streamed message content, tool names, tool arguments, and raw tool outputs intended for the local user interface. This issue is fixed in version 0.56.0.

## Affected

- `openhuman < 0.56.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.