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CVE-2026-34182CriticalRevised 8 Sep

CMS AuthEnvelopedData Processing May Accept Forged Messages

MSRC advisory NVD CVE.org

Assessment

Severity
Critical
CVSS base score
9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Impact
Not stated
EPSS, next 30 days
Not scored yet
Public exploit code
No Nuclei template lists it
Exploitability
Not assessed
Publicly disclosed
No
Customer action
Required: apply the update
Component
Mariner
Weakness
CWE-354: Improper Validation of Integrity Check Value
Issued by
openssl
Published
16 Jun 2026 · September 2026
Last revised
8 Sep 2026Information published.

Updates that fix it

0 KBs

No KB listed

MSRC lists no downloadable update, which usually means a service-side fix or a release-notes update. Check the MSRC advisory.

Affected products

Developer Tools, Open Source Software
6 affected products
  • azl3 edk2 20240524git3e722403cd16-17 on Azure Linux 3.0
  • azl3 openssl 3.3.5-5 on Azure Linux 3.0
  • Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)
  • Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10)
  • Microsoft Visual Studio 2022 version 17.14
  • Microsoft Visual Studio 2026 version 18.9

What changed

First observed 14 Oct 2026
  1. 14 Oct 2026 Source coverage: msrc-cvrfIncomplete → Current

The most recent 100 field changes are listed. Complete recorded revisions are kept separately.

Cite this recorded revision to keep the same title, summary, facts and links when the page changes.

A day selects the latest observation by the end of that UTC day; today's selection can change until midnight. History starts when this installation records it.

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 14 Oct 11:53 UTC · 252 of 253 readable · 251 fully read · documentation 0/409 current

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