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.
Published: 2026-10-13
Score: 3.7 Low
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Workaround

Prefer explicit username:password entries in httpd.conf instead of /:*:* system-password wildcards. Use PAM-based authentication where available. Ensure BusyBox is built with FEATURE_SHADOWPASSWDS enabled (default).

Tracking

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Advisories

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History

Tue, 13 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 13 Oct 2026 17:15:00 +0000

Type Values Removed Values Added
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.
Title Busybox: busybox: httpd user existence oracle in non-default shadow-disabled builds
First Time appeared Redhat
Redhat hummingbird
Weaknesses CWE-203
CPEs cpe:/a:redhat:hummingbird:1
Vendors & Products Redhat
Redhat hummingbird
References
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N'}


Subscriptions

Redhat Hummingbird
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-10-13T17:16:43.731Z

Reserved: 2026-09-10T09:42:04.559Z

Link: CVE-2026-88834

cve-icon Vulnrichment

Updated: 2026-10-13T17:16:38.503Z

cve-icon NVD

Status : Received

Published: 2026-10-13T17:17:48.203

Modified: 2026-10-13T18:17:26.430

Link: CVE-2026-88834

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses