MEDIUM 5.3 Microsoft
CVE-2026-88831
Busybox: busybox: httpd silently fails open when ip deny rules contain invalid cidr prefix lengths
Microsoft Security Update 2026-Sep: Busybox: busybox: httpd silently fails open when ip deny rules contain invalid cidr prefix lengths
Affected Products
- azl3 busybox 1.36.1-27 on Azure Linux 3.0
- azl3 busybox 1.36.1-28 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88831
- https://nvd.nist.gov/vuln/detail/CVE-2026-88831
This medium severity vulnerability with a CVSS score of 5.3 was published on 2026-09-08 via Microsoft. Affected: azl3 busybox 1.36.1-27 on Azure Linux 3.0, azl3 busybox 1.36.1-28 on Azure Linux 3.0.
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