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CVE-2026-46538— Microsoft UFO accepts cross-device TASK_END messages by session_id only, allowing peer task-result injection

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版本存在数据伪造问题漏洞，该漏洞源于任务响应仅通过session_id追踪而未验证来源设备，可能导致跨设备任务结果注入。

CVSS 5.9 · Medium EPSS 0.29% · P20

Affected Version Matrix 1

VendorProduct Version RangeStatus
microsoft UFO 3.0.1-4-ge2626659 affected
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I. Basic Information for CVE-2026-46538

Vulnerability Information
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Vulnerability Title
Microsoft UFO accepts cross-device TASK_END messages by session_id only, allowing peer task-result injection
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's constellation client tracks pending task responses by session_id only and does not verify that a TASK_END message came from the device that originally received the task. When the constellation sends a task to a target device, it records a pending Future under a session key. The pending task record stores the expected device ID, but the completion path ignores that binding. If another authenticated peer device sends a forged TASK_END with the same session_id, the constellation accepts the response and completes the victim device's pending Future with attacker-controlled result data. This is an authenticated cross-device task-result injection issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
使用捕获-重放进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
UFO³ 数据伪造问题漏洞
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版本存在数据伪造问题漏洞，该漏洞源于任务响应仅通过session_id追踪而未验证来源设备，可能导致跨设备任务结果注入。
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-2026-46538

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III. Intelligence Information for CVE-2026-46538

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Vendor Advisories for CVE-2026-46538 (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-2026-46416 6.3 MEDIUM Microsoft UFO shared WebSocket handler state causes cross-client response hijacking
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-294

V. Comments for CVE-2026-46538

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