CVE-2026-88831
Medium · 5.3CVSS
5.3
EPSS
0.2%
Published
Sep 23, 2026
CISA due date
—
The record
BusyBox httpd IP deny rules with invalid CIDR prefix lengths fail open, leaving a parsed IP with a zeroed mask so the rule matches no clients.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|
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