What is CVE-2026-46544?

CVE-2026-46544 is a medium-severity vulnerability in Microsoft Ufo, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.3/10. Published 2026-05-27.

How severe is CVE-2026-46544?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Microsoft Ufo

CVE-2026-46544

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…

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.000 (10.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Microsoft Ufo — versions 3.0.1-4-ge2626659

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-46544?: CVE-2026-46544 is a medium-severity vulnerability in Microsoft Ufo, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.3/10. Published 2026-05-27.
How severe is CVE-2026-46544?: Medium severity. CVSS v3 base score is 5.3 out of 10.