BusyBox httpd treats yescrypt ($y$) password hashes as plaintext during Basic Authentication, inverting the authentication check.

Project Subscriptions

Vendors Products
Busybox Subscribe
Busybox Subscribe
Hardened Images Subscribe
Hummingbird Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

Do not use BusyBox httpd for password-protected resources. If it must be used, configure authentication with SHA-512 ($6$) hashes, which are correctly detected. Upstream should update the hash detection logic to recognize the $y$ prefix.

History

Thu, 24 Sep 2026 09:45:00 +0000

Type Values Removed Values Added
First Time appeared Busybox
Busybox busybox
Redhat hardened Images
Vendors & Products Busybox
Busybox busybox
Redhat hardened Images

Thu, 24 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Wed, 23 Sep 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Wed, 23 Sep 2026 18:00:00 +0000

Type Values Removed Values Added
Description BusyBox httpd treats yescrypt ($y$) password hashes as plaintext during Basic Authentication, inverting the authentication check.
Title Busybox: busybox: httpd misidentifies yescrypt password hashes as plaintext, inverting authentication
First Time appeared Redhat
Redhat hummingbird
Weaknesses CWE-305
CPEs cpe:/a:redhat:hummingbird:1
Vendors & Products Redhat
Redhat hummingbird
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N'}


Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-09-23T18:00:58.072Z

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

Link: CVE-2026-88837

cve-icon Vulnrichment

Updated: 2026-09-23T18:00:27.062Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-23T18:17:10.493

Modified: 2026-09-24T14:51:56.593

Link: CVE-2026-88837

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-23T16:35:00Z

Links: CVE-2026-88837 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-24T09:10:30Z

Weaknesses