Vulnerability · Published Oct 6, 2026 · Assigned by GitHub_M

CVE-2026-105792Microsoft UFO: Authenticated task-result request can deadlock UFO server session manager

Medium 6.5

In plain English

A medium-severity security flaw in UFO from microsoft. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.7%top 47.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Microsoft UFO is an open-source framework for intelligent automation across devices and platforms. Prior to 3.0.9, the /api/task_result/{task_name} endpoint calls SessionManager.get_result_by_task() in ufo/server/services/session_manager.py, which acquires a non-reentrant lock and then calls SessionManager.get_result() to acquire the same lock again when the task name maps to a session. An authenticated caller who knows or creates a mapped task name can therefore block the request indefinitely, and in the default single-process server configuration the blocked event-loop thread prevents other HTTP, WebSocket, and dependent background interactions. Unknown task names do not reach the nested call and are not affected. This issue is fixed in version 3.0.9.

Affected products (as reported)

Vendor	Product	Versions
microsoft	UFO	< 3.0.9

Weakness: CWE-833 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/microsoft/UFO/security/advisories/GHSA-3hwr-qx8m-9xxx x_refsource_CONFIRM
https://github.com/microsoft/UFO/commit/0eeb792333ce76c856bc1c8b05fd65fc26bd3c50 x_refsource_MISC
https://github.com/microsoft/UFO/releases/tag/v3.0.9 x_refsource_MISC