CVE-2026-46544

MEDIUM
MEDIUM Priority: 0.02 BB Relevance: 51/100
Published: 2026-05-27 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Network No Interaction Conf. Impact

CVSS Vector Breakdown

AV: Network
AC: High
PR: Low
UI: None
S: Unchanged
C: High
I: None
A: None

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.

Weakness Classification (1)

Bug Bounty Relevance

51 / 100
✓ Network accessible
✓ No user interaction

CVSS Score

5.3 / 10.0 v3.1
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS — Exploitation Probability

0.46%
Raw Score 0.004600
Percentile 39.8%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00460
2026-10-28
0.00460

Intelligence Sources

nvd ref →