What is CVE-2026-42823?

CVE-2026-42823 is a critical-severity vulnerability in Microsoft Azure Logic Apps, classified under Improper Access Control. CVSS score: 9.9/10. Published 2026-05-12.

How severe is CVE-2026-42823?

Critical severity. CVSS v3 base score is 9.9 out of 10.

Vulnerability in Microsoft Azure Logic Apps

CVE-2026-42823

Improper access control in Azure Logic Apps allows an authorized attacker to elevate privileges over a network.

EPSS: 0.001 (21.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Microsoft Azure Logic Apps
Microsoft Azure_logic_apps

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

Azure Logic Apps Elevation of Privilege Vulnerability (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-42823?: CVE-2026-42823 is a critical-severity vulnerability in Microsoft Azure Logic Apps, classified under Improper Access Control. CVSS score: 9.9/10. Published 2026-05-12.
How severe is CVE-2026-42823?: Critical severity. CVSS v3 base score is 9.9 out of 10.