CVE-2026-88834
Published: October 20, 2026Last modified: October 21, 2026
Description
A flaw was found in BusyBox's httpd web server. When configured with system password authentication, a user existence oracle may exist in certain build configurations. An attacker could distinguish existing from non-existing usernames by observing authentication failure behavior. Impact is limited to username enumeration and requires non-default compile options or uncommon password file states; default BusyBox builds with shadow password support are not affected.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 3.7 |
| Attack Vector | NETWORK |
| Attack complexity | HIGH |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | LOW |
| Integrity impact | NONE |
| Availability impact | NONE |
| Vector | CVSS:3.1/AV:N/AC:H/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 | Unknown (1.35.0-r29) |
| 25 LTS | busybox | Unknown (1.37.0-r20) | |
| Stream | busybox | Unknown (1.36.1-r1) | |
| Hardened Containers | 23 LTS | busybox | Not affected (1.35.0-r29) |
| 25 LTS | busybox | Not affected (1.37.0-r20) | |
| Stream | busybox | Not affected (1.36.1-r1) |