CVE Catalog

CVE-2026-46544

MediumCVSS 5.3
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.42%

36th percentile - higher than 36% of all known CVEs

Summary

In Microsoft UFO version 3.0.1-4-ge2626659, the server accepts client-supplied session_id values in WebSocket task messages and reuses an existing in-memory session object. If a prior session has completed and remains in memory with results, a different authenticated client can send a new TASK message with the same session_id and receive the stale result. This requires knowing or predicting a live or recently completed session_id.

Risk Assessment

An authenticated attacker may retrieve stale results from another client's session, potentially leading to cross-client information disclosure. The risk depends on the ability to predict session identifiers.

Recommendation

Update Microsoft UFO to a version containing the fix or implement session invalidation and isolation after completion. Ensure session_id unpredictability and verify session ownership server-side.

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 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.

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