CVE-2026-34182: CMS AuthEnvelopedData Processing May Accept Forged Messages

Overview

Severity

Critical (CVSS 9.1)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Exploit Status

Not Exploited

Patch Tuesday

2026-Jun

Released

2026-06-13

Last Updated

2026-06-23

EPSS Score

0.35% (percentile: 27.6%)

Affected Products (7)

Open Source Software

• azl3 cloud-hypervisor 51.1.56-1 on Azure Linux 3.0
• azl3 edk2 20240524git3e722403cd16-17 on Azure Linux 3.0
• azl3 nodejs 24.14.1-3 on Azure Linux 3.0
• azl3 openssl 3.3.5-5 on Azure Linux 3.0
• azl3 qemu 9.1.0-7 on Azure Linux 3.0
• azl3 rust 1.75.0-29 on Azure Linux 3.0
• azl3 rust 1.90.0-8 on Azure Linux 3.0

Revision History

• 2026-06-13: Information published.
• 2026-06-16: Information published.
• 2026-06-18: Information published.
• 2026-06-23: Information published.