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Microsoft Security Response CenterCVE-2026-34182

CMS AuthEnvelopedData Processing May Accept Forged Messages

Mariner

Read the vendor bulletin Get alerts for Microsoft Visual Studio
9.1CVSS out of 10Critical severity
Scope

What the vendor says is affected

  • Microsoft Visual Studio 2022 version 17.14
  • Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10)
  • Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)
  • azl3 edk2 20240524git3e722403cd16-17 on Azure Linux 3.0
  • azl3 openssl 3.3.5-5 on Azure Linux 3.0
  • Microsoft Visual Studio 2026 version 18.9

Versions the vendor lists as fixed

  • 16.11.60
  • 15.9.83
  • 17.14.40
  • 20240524git3e722403cd16-18
  • 3.3.7-2
  • 18.9.3
Next step

What the vendor recommends

Release Notes CBL-Mariner Releases

Review the complete instructions on the vendor's site
Timeline

When this advisory changed

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Updated by Microsoft Security Response Center

    The vendor changed the advisory after it was first published.

  3. Added to SecurityAlert

    We collected the advisory from the official source.

  4. Confirmed at the source

    Our collector saw this advisory during a later source check.

Vulnerabilities

CVEs named in this advisory

CVE-2026-34182View CVSS, KEV, EPSS, and threat context
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