---
id: CVE-2026-56098
title: A flaw was found in rubygem-katello
summary: >-
  A flaw was found in rubygem-katello. The RegistryProxiesController in Katello
  contains an authorization bypass vulnerability due to an execution
  fall-through in the registry_authorize filter. While the application
  identifies unauthorized…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-203
vendor: Red Hat
product: rubygem-katello
affected:
  - rubygem-katello (all versions)
  - rubygem-katello (all versions)
  - rubygem-katello (all versions)
  - rubygem-katello (all versions)
  - rubygem-katello (all versions)
  - katello (all versions)
  - 'satellite:el8/rubygem-katello (all versions)'
patched:
  - satellite_6_16_for_rhel 8
  - satellite_6_16_for_rhel 9
  - satellite_6_18_for_rhel 9
  - satellite_6_19_for_rhel 9
published: '2026-10-01'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T07:17:01.217'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-56098'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2026:74503'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:74504'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:74505'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:74506'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2026-56098'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2490542'
    label: secalert@redhat.com
  - url: 'http://www.openwall.com/lists/oss-security/2026/10/07/3'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-56098.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-56098'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-56098'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-01T18:02:50.614551Z'
epss: 0.00324
epssPercentile: 0.25289
ingestedAt: '2026-10-01T18:55:42.375Z'
---

## Overview

A flaw was found in rubygem-katello. The RegistryProxiesController in Katello contains an authorization bypass vulnerability due to an execution fall-through in the registry_authorize filter. While the application identifies unauthorized requests and triggers an error response via the unauthorized method, it fails to halt the execution of the current code path (missing return statement). This failure in the control flow allows the application to proceed into subsequent business logic and database validation filters. Consequently, the application reveals its internal state through differential responses, allowing an unprivileged attacker to enumerate valid Users, Organizations, and Products across the entire instance.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **RHSA-2026:74506** · Red Hat · fixed in: Red Hat Satellite 6.16 for RHEL 8, Red Hat Satellite 6.16 for RHEL 9 · released 2026-10-01 · [advisory](https://access.redhat.com/errata/RHSA-2026:74506)
- **RHSA-2026:74504** · Red Hat · fixed in: Red Hat Satellite 6.18 for RHEL 9 · released 2026-10-01 · [advisory](https://access.redhat.com/errata/RHSA-2026:74504)
- **RHSA-2026:74503** · Red Hat · fixed in: Red Hat Satellite 6.19 for RHEL 9 · released 2026-10-01 · [advisory](https://access.redhat.com/errata/RHSA-2026:74503)
- **Red Hat VEX** · Moderate · affected: Red Hat Satellite 6 · no fix planned: Red Hat Satellite 6 · updated 2026-10-02 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-56098.json)
- **RHSA-2026:74505** · Red Hat · fixed in: Red Hat Satellite 6.17 for RHEL 9 · released 2026-10-01 · [advisory](https://access.redhat.com/errata/RHSA-2026:74505)