CVE Catalog

CVE-2026-46416

MediumCVSS 6.3
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.28%

20th percentile - higher than 20% of all known CVEs

Summary

In Microsoft UFO version 3.0.1-4-ge2626659, a single shared UFOWebSocketHandler instance is reused for multiple authenticated WebSocket connections. Per-connection protocol objects are stored in mutable instance fields that are overwritten by each new connection, causing protocol responses to be sent to the wrong client.

Risk Assessment

The most recently connected authenticated client can receive protocol responses belonging to another authenticated client. This can lead to information disclosure and session isolation violations between clients.

Recommendation

Update Microsoft UFO to a version containing the fix. Until then, limit concurrent WebSocket connections or add additional session isolation.

Other vulnerabilities in Microsoft UFO

See all
Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS