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CVE-2026-46416— Microsoft UFO shared WebSocket handler state causes cross-client response hijacking

Quick assessment

Affected
microsoft UFO
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

UFO³是Microsoft开源的一个跨设备协作的多智能体任务编排工具。 UFO³ 3.0.1-4-ge2626659版本存在安全漏洞，该漏洞源于共享WebSocket处理器实例中可变实例字段被覆盖，可能导致响应混淆。

CVSS 6.3 · Medium EPSS 0.45% · P37

Possible ATT&CK Techniques 1 AI

T1565.001 · Stored Data Manipulation

Affected Version Matrix 1

VendorProduct Version RangeStatus
microsoft UFO 3.0.1-4-ge2626659 affected
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I. Basic Information for CVE-2026-46416

Vulnerability Information
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Vulnerability Title
Microsoft UFO shared WebSocket handler state causes cross-client response hijacking
Source: CVE Program / CVE List V5
Vulnerability Description
Microsoft UFO open-source framework for intelligent automation across devices and platforms. In 3.0.1-4-ge2626659, Microsoft UFO creates one shared UFOWebSocketHandler instance and reuses it for multiple authenticated WebSocket connections. The handler stores per-connection protocol objects in mutable instance fields. Each new WebSocket connection overwrites those fields. Later, message handlers send responses through the shared fields instead of through protocol objects bound to the originating connection. As a result, the most recently connected authenticated client can receive protocol responses that belong to another authenticated client.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
UFO³ 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
UFO³是Microsoft开源的一个跨设备协作的多智能体任务编排工具。 UFO³ 3.0.1-4-ge2626659版本存在安全漏洞，该漏洞源于共享WebSocket处理器实例中可变实例字段被覆盖，可能导致响应混淆。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
microsoft UFO 3.0.1-4-ge2626659 -

II. Public POCs for CVE-2026-46416

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III. Intelligence Information for CVE-2026-46416

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Vendor Advisories for CVE-2026-46416 (1)

Same Patch Batch · microsoft · 2026-05-27 · 6 CVEs total

CVE-2026-46414 8.8 HIGH Microsoft UFO WebSocket role spoofing allows authenticated peer task hijacking
CVE-2026-46402 8.1 HIGH Microsoft UFO uses untrusted task_name in log paths, allowing authenticated path traversal
CVE-2026-45322 7.8 HIGH OS Command Injection in Microsoft UFO Shell Action Replay via Stored Session JSON
CVE-2026-46538 5.9 MEDIUM Microsoft UFO accepts cross-device TASK_END messages by session_id only, allowing peer tas
CVE-2026-46544 5.3 MEDIUM Microsoft UFO reuses client-supplied WebSocket session IDs and replays stale task results

IV. Related Vulnerabilities

Same product: UFO
Same vendor: microsoft
Same weakness: CWE-284

V. Comments for CVE-2026-46416

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