CVE-2026-4324: Katello SQL Injection Vulnerability

MODERATE
Advisory Identifier: GHSA-fwj4-6wgp-mpxm
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CVSS 5.4
CWE-89
Published
Advisory Summary

CVE-2026-4324 is a MODERATE (CVSS 5.4) sql injection vulnerability (CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')) affecting Katello libraries in the RubyGems ecosystem. The issue involves denial of service and potential information disclosure via sql injection. Remediation is available by upgrading affected packages to version 4.19.1.

CVE-2026-4324 at a Glance

CVE Identifier CVE-2026-4324
GHSA Identifier GHSA-fwj4-6wgp-mpxm
Severity MODERATE
CVSS v3.1 Base Score 5.4
CWE Classification CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Affected Product Katello
Package Ecosystem RubyGems
Published Date
Last Updated

Security Impact

CVSS: 5.4

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity None (I:N)
Availability Low (A:L)

How to Fix CVE-2026-4324

To remediate this vulnerability, upgrade all affected Katello dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

katello fixed: 4.19.1 
Upgrade katello to 4.19.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for katello

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-4324, inspect your project dependencies for Katello:

inspect dependencies for katello

Analyze the terminal output to locate any version of Katello in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.19.1), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection'), where the product constructs all or part of an sql command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended sql command when it is sent to a downstream component. without sufficient removal or quoting of sql syntax in user-controllable inputs, the generated sql query can cause those inputs to be interpreted as sql instead of ordinary user data. In Katello, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

A flaw was found in the Katello plugin for Red Hat Satellite. This vulnerability, caused by improper sanitization of user-provided input, allows a remote attacker to inject arbitrary SQL commands into the sort_by parameter of the /api/hosts/bootc_images API endpoint. This can lead to a Denial of Service (DoS) by triggering database errors, and potentially enable Boolean-based Blind SQL injection, which could allow an attacker to extract sensitive information from the database.

CVE-2026-4324 Affected Katello Versions

1 component(s)
Fixed Versions:
4.19.1
Product / Package Ecosystem Affected Versions Fixed Version
katello
gem/katello
RubyGems
< 4.19.1
4.19.1

References

NVD — CVE-2026-4324 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4324
Security Fix Commit FIX COMMIT
https://github.com/Katello/katello/commit/a0a793b08d4f0a897ee985d79a687ad043f99e57
access.redhat.com/errata/rhsa-2026:22... WEB
https://access.redhat.com/errata/RHSA-2026:22326
access.redhat.com/errata/rhsa-2026:59... WEB
https://access.redhat.com/errata/RHSA-2026:5968
access.redhat.com/errata/rhsa-2026:59... WEB
https://access.redhat.com/errata/RHSA-2026:5970
Katello Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2026-4324
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2448349
Katello Source Repository REPOSITORY
https://github.com/Katello/katello

Frequently Asked Questions

What is CVE-2026-4324?
CVE-2026-4324 is a security vulnerability in Katello involving Denial of Service and potential information disclosure via SQL injection under CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection').
Which Katello versions are affected?
Affected versions include releases prior to 4.19.1 across affected packages: katello.
What version fixes CVE-2026-4324?
Upgrading to 4.19.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is katello affected?
Yes, katello is affected in releases prior to 4.19.1. Upgrade your dependency to 4.19.1 or later.
What is the CVSS score of CVE-2026-4324?
CVE-2026-4324 has a CVSS v3.1 base score of 5.4 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L.
What CWE is associated with CVE-2026-4324?
CVE-2026-4324 is classified under CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') (The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.).
How can I check RubyGems dependencies for CVE-2026-4324?
Run the dependency tree command: 'inspect dependencies for katello'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-fwj4-6wgp-mpxm",
  "modified" : "2026-06-01T21:30:32Z",
  "published" : "2026-03-17T15:36:23Z",
  "aliases" : [ "CVE-2026-4324" ],
  "summary" : "Katello: Denial of Service and potential information disclosure via SQL injection",
  "details" : "A flaw was found in the Katello plugin for Red Hat Satellite. This vulnerability, caused by improper sanitization of user-provided input, allows a remote attacker to inject arbitrary SQL commands into the sort_by parameter of the /api/hosts/bootc_images API endpoint. This can lead to a Denial of Service (DoS) by triggering database errors, and potentially enable Boolean-based Blind SQL injection, which could allow an attacker to extract sensitive information from the database.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "RubyGems",
      "name" : "katello"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "4.19.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-4324"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Katello/katello/commit/a0a793b08d4f0a897ee985d79a687ad043f99e57"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:22326"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:5968"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:5970"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/security/cve/CVE-2026-4324"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2448349"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/Katello/katello"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-89" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-18T17:25:29Z",
    "nvd_published_at" : "2026-03-17T14:16:19Z"
  }
}