Microsoft UFO 3.0.1-4-ge2626659 session_id authentication replay

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Microsoft UFO 3.0.1-4-ge2626659. The impacted element is an unknown function. Performing a manipulation of the argument session_id results in authentication replay. This vulnerability is cataloged as CVE-2026-46538. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Microsoft UFO 3.0.1-4-ge2626659. It has been classified as problematic. This affects an unknown functionality. The manipulation of the argument session_id with an unknown input leads to a authentication replay vulnerability. CWE is classifying the issue as CWE-294. A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes). This is going to have an impact on integrity, and availability. The summary by CVE is:

Microsoft UFO open-source framework for intelligent automation across devices and platforms. In 3.0.1-4-ge2626659, Microsoft UFO's constellation client tracks pending task responses by session_id only and does not verify that a TASK_END message came from the device that originally received the task. When the constellation sends a task to a target device, it records a pending Future under a session key. The pending task record stores the expected device ID, but the completion path ignores that binding. If another authenticated peer device sends a forged TASK_END with the same session_id, the constellation accepts the response and completes the victim device's pending Future with attacker-controlled result data. This is an authenticated cross-device task-result injection issue.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-46538 since 05/14/2026. The exploitability is told to be difficult. It is possible to initiate the attack remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 05/28/2026). MITRE ATT&CK project uses the attack technique T1040 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• Microsoft

Name

• UFO

Version

• 3.0.1-4-ge2626659

License

• commercial

Website

• Vendor: https://www.microsoft.com/
• Product: https://github.com/microsoft/UFO/

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