Authenticated response hijacking via shared WebSocket state
Published May 27, 2026 · Updated May 27, 2026
Session confusion in Microsoft UFO 3.0.1-4-ge2626659 allows remote authenticated users to receive another client's WebSocket responses. The shared UFOWebSocketHandler in ufo/server/app.py overwrites connection-specific protocol fields in ufo/server/ws/handler.py and later sends through the newest fields. A second authenticated connection must replace that state; the latest client can obtain peer device information and task acknowledgments.
Summary
What happened
Session confusion in Microsoft UFO 3.0.1-4-ge2626659 allows remote authenticated users to receive another client's WebSocket responses. The shared UFOWebSocketHandler in ufo/server/app.py overwrites connection-specific protocol fields in ufo/server/ws/handler.py and later sends through the newest fields. A second authenticated connection must replace that state; the latest client can obtain peer device information and task acknowledgments.
The record
- CVE
- CVE-2026-46416
- Published
- May 27, 2026
- Updated
- May 27, 2026
- Vendor
- Microsoft
- Product
- UFO
- Classifications
- CWE-488, CWE-284
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- May 27, 2026CVE publishedPublication date reported by the CVE source.
- May 27, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=3.0.1-4-ge2626659
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- GHSA-cwwh-p9rv-4pj4 non-destructive WebSocket response-hijacking PoCproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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