CVE-2026-88831
Published: September 26, 2026Last modified: October 22, 2026
Description
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.3 |
| Attack Vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | LOW |
| Integrity impact | NONE |
| Availability impact | NONE |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
Notes
httpd is included only as part of busybox-extras.
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | busybox | Fixed (1.35.0-r42) |
| 25 LTS | busybox | Fixed (1.37.0-r29) | |
| Stream | busybox | Fixed (1.38.0-r6) | |
| Hardened Containers | 23 LTS | busybox | Fixed (1.35.0-r42) |
| 25 LTS | busybox | Fixed (1.37.0-r29) | |
| Stream | busybox | Fixed (1.38.0-r6) |