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CVE-2026-46544— Microsoft UFO reuses client-supplied WebSocket session IDs and replays stale task results to new authenticated requesters

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，该漏洞源于重用已存在的session_id导致返回过期结果，可能导致跨客户端结果重放。

CVSS 5.3 · Medium EPSS 0.67% · P50

Affected Version Matrix 1

VendorProduct Version RangeStatus
microsoft UFO 3.0.1-4-ge2626659 affected
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I. Basic Information for CVE-2026-46544

Vulnerability Information
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Vulnerability Title
Microsoft UFO reuses client-supplied WebSocket session IDs and replays stale task results to new authenticated requesters
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 accepts client-supplied session_id values in WebSocket task messages and reuses an existing in-memory session object if that session_id already exists. If a prior session has completed and remains in memory with populated results, a different authenticated client can send a new TASK message using the same session_id. The server re-enters the existing session object and sends the stale stored result to the new requester through the normal send_task_end() callback path. This is an authenticated cross-client stale result replay issue. The issue requires that the attacker knows or can predict a live or recently completed session_id.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
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，该漏洞源于重用已存在的session_id导致返回过期结果，可能导致跨客户端结果重放。
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-2026-46544

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III. Intelligence Information for CVE-2026-46544

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Vendor Advisories for CVE-2026-46544 (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-2026-46538 5.9 MEDIUM Microsoft UFO accepts cross-device TASK_END messages by session_id only, allowing peer tas

IV. Related Vulnerabilities

Same product: UFO
Same vendor: microsoft
Same weakness: CWE-639

V. Comments for CVE-2026-46544

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