TI-2026-85515 Aliases CVE-2026-49405

OpenHuman event stream endpoint leaks user-facing data without authentication

MEDIUM 61CWE-200Published 2026-11-05 · Updated 2026-11-05

Key facts

Attack vector: Local
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Information disclosure, Security bypass
Confidentiality · integrity · availability: High · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-200 and CWE-306.

Summary

OpenHuman before 0.56.0 exposes its server-sent events endpoint at /events without bearer authentication and allows cross-origin browser access. A local client, or a web page opened by the victim, can subscribe to another client's stream by supplying a known or guessed client_id, since the fixed system identifier makes the proactive-message stream predictable. The exposed events can include complete assistant responses, tool arguments, and raw tool outputs, which is a case of missing authentication (CWE-306) leading to information exposure (CWE-200).

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00254 16th percentileScored 2026-11-07

Fix Fixed openhuman (tinyhumansai): 0.56.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
tinyhumansai	openhuman	before 0.56.0	0.56.0	Patch available	CNA

openhuman Vendortinyhumansai Affected before 0.56.0 Fixed in 0.56.0 Patch available CNA

Remediation

Upgrade OpenHuman to version 0.56.0, which fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Fix · CNA openhuman (tinyhumansai) Fixed in 0.56.0

Timeline

2026-11-05 Threatist record created from CVE-2026-49405
2026-11-05 CISA SSVC decision points changed

References

Other 4

TI-2026-85521 Prompt injection in OpenHuman background sync runs Composio actions CVSS 3.1HIGH 8.7
TI-2026-75524 OpenHuman Telegram login callback lets attackers swap user sessions CVSS 3.1HIGH 8.1
TI-2026-85522 OpenHuman lets channel messages create unapproved shell cron jobs CVSS 3.1CRITICAL 9.8
TI-2026-40241 OpenHuman desktop agent shell tool sandbox bypass leads to arbitrary command execution CVSS 4.0CRITICAL 9.4
TI-2026-85516 OpenHuman Yuanbao channel bypasses approval for node_exec commands CVSS 3.1CRITICAL 9.0
TI-2026-85523 OpenHuman bearer token leak via process environment variable on macOS CVSS 3.1HIGH 8.8

See all 11 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences