CVE-2026-3632LowMicrosoft CVSS 3.9CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L

Microsoft security update for CVE-2026-3632

Published
May 31, 2026
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2026-3632 →

📋 Microsoft's advisory

EchelonGraph does not copy Microsoft's advisory page: its FAQ and remediation text are not shown here. Read the advisory on https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-3632. This page also shows what EchelonGraph holds for CVE-2026-3632, with the description from its CVE record, which the CVE Numbering Authority that assigned the CVE wrote: for a CVE Microsoft assigned, often in the words of Microsoft's own advisory.

🎯 Affected products10

  • azl3 libsoup 3.4.4-12 on Azure Linux 3.0
  • azl3 libsoup 3.4.4-14 on Azure Linux 3.0
  • azl3 libsoup 3.4.4-15 on Azure Linux 3.0
  • azl3 libsoup 3.4.4-16 on Azure Linux 3.0
  • azl3 libsoup 3.4.4-17 on Azure Linux 3.0
  • azl3 libsoup 3.4.4-18 on Azure Linux 3.0
  • cbl2 libsoup 3.0.4-12 on CBL Mariner 2.0
  • cbl2 libsoup 3.0.4-13
  • cbl2 libsoup 3.0.4-13 on CBL Mariner 2.0
  • cbl2 libsoup 3.0.4-13 on CBL-Mariner 2.0

✅ Updates Microsoft lists: 1 update

1 row: one per KB article or update, update type and fixed build. Their details are on Microsoft's advisory.

KB articleUpdateFixed build
—Security Update—

🧭 EchelonGraph on CVE-2026-3632

EchelonGraph score
5.5 MEDIUM
CISA KEV
Not listed
Fix status
A fix is available — apply it.

Description from the CVE record (CVE.org), as published by its numbering authority

A flaw was found in libsoup, a library used by applications to send network requests. This vulnerability occurs because libsoup does not properly validate hostnames, allowing special characters to be injected into HTTP headers. A remote attacker could exploit this to perform HTTP smuggling, where they can send hidden, malicious requests alongside legitimate ones. In certain situations, this could lead to Server-Side Request Forgery (SSRF), enabling an attacker to force the server to make unauthorized requests to other internal or external systems. The impact is low, as SoupServer is not actually used in internet infrastructure.

Published by Red Hat, Inc., the CVE Numbering Authority that assigned CVE-2026-3632, in its CVE record at CVE.org; reused under the CVE Program's Terms of Use (its licence and MITRE's copyright notice are in our Terms of Service).

🔗 References (2)