This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-88831 →

DEBIAN-CVE-2026-88831

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.

Original description

The description as published by the source.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Debian:12 busybox

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:13 busybox

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:14 busybox

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]