Not Failing Securely ('Failing Open') Affecting busybox package, versions <0:1.37.0-9.1.hum1


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.24% (14th percentile)

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  • Snyk IDSNYK-RHEL10-BUSYBOX-20071594
  • published24 Sept 2026
  • disclosed23 Sept 2026

Introduced: 23 Sep 2026

NewCVE-2026-88831  (opens in a new tab)
CWE-636  (opens in a new tab)

How to fix?

Upgrade RHEL:10 busybox to version 0:1.37.0-9.1.hum1 or higher.
This issue was patched in RHSA-2026:72111.

NVD Description

Note: Versions mentioned in the description apply only to the upstream busybox package and not the busybox package as distributed by RHEL. See How to fix? for RHEL:10 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1