What is CVE-2026-35428?

CVE-2026-35428 is a critical-severity vulnerability in Microsoft Azure Cloud Shell, classified under Command Injection. CVSS score: 9.6/10. Published 2026-05-07.

How severe is CVE-2026-35428?

Critical severity. CVSS v3 base score is 9.6 out of 10.

RCE in Microsoft Azure Cloud Shell

CVE-2026-35428

Improper neutralization of special elements used in a command ('command injection') in Azure Cloud Shell allows an unauthorized attacker to perform spoofing over a network.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.000 (12.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

Affected products

Microsoft Azure Cloud Shell
Microsoft Azure_cloud_shell

Weakness classification (CWE)

CWE-77 — Command Injection

References

Azure Cloud Shell Spoofing Vulnerability (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-35428?: CVE-2026-35428 is a critical-severity vulnerability in Microsoft Azure Cloud Shell, classified under Command Injection. CVSS score: 9.6/10. Published 2026-05-07.
How severe is CVE-2026-35428?: Critical severity. CVSS v3 base score is 9.6 out of 10.