LOW 2.9 Microsoft
CVE-2026-45186
In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service via moderately sized crafted XML input.
Microsoft Security Update 2026-May: In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service via moderately sized crafted XML input.
Affected Products
- azl3 cmake 3.30.3-13 on Azure Linux 3.0
- azl3 python3 3.12.9-10 on Azure Linux 3.0
- azl3 expat 2.6.4-6 on Azure Linux 3.0
Remediation
$ sudo apt install --only-upgrade expatReferences
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45186
- https://nvd.nist.gov/vuln/detail/CVE-2026-45186
This low severity vulnerability with a CVSS score of 2.9 was published on 2026-05-12 via Microsoft. A remediation command is available below. Affected: azl3 cmake 3.30.3-13 on Azure Linux 3.0, azl3 python3 3.12.9-10 on Azure Linux 3.0, azl3 expat 2.6.4-6 on Azure Linux 3.0.
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