What is CVE-2026-0990?

CVE-2026-0990 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. Libxml2: libxml2: denial of service via uncontrolled recursion in xml catalog processing

Which CVE IDs does CVE-2026-0990 cover?

CVE-2026-0990 covers the following CVE IDs: CVE-2026-0990. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-0990?

CVE-2026-0990 has a CVSS v3 base score of 5.9, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-0990?

CVE-2026-0990 affects 5 products, including: azl3 libxml2 2.11.5-7 on Azure Linux 3.0; azl3 libxml2 2.11.5-8 on Azure Linux 3.0; azl3 libxml2 2.11.5-9 on Azure Linux 3.0; cbl2 libxml2 2.10.4-10 on CBL Mariner 2.0; cbl2 libxml2 2.10.4-9 on CBL Mariner 2.0.

CVE-2026-0990MediumCVSS 5.9

Libxml2: libxml2: denial of service via uncontrolled recursion in xml catalog processing

Vendor

Microsoft Security Response Center (MSRC)

Published

June 2, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-0990 →

🎯 Affected products5

azl3 libxml2 2.11.5-7 on Azure Linux 3.0
azl3 libxml2 2.11.5-8 on Azure Linux 3.0
azl3 libxml2 2.11.5-9 on Azure Linux 3.0
cbl2 libxml2 2.10.4-10 on CBL Mariner 2.0
cbl2 libxml2 2.10.4-9 on CBL Mariner 2.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 2.11.5-9 KBCBL-Mariner Releases (Security Update) — fixed build 2.10.4-10

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-0990
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade