CVE-2026-4324 is a medium-severity (CVSS 5.4) SQL Injection vulnerability in katello. A fix is available for katello — see the affected versions and patch details below.
Katello: Denial of Service and potential information disclosure via SQL injection
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2026-4324.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
CVE-2026-4324 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 377,636 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
katelloReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects RubyGems packages — download data is not available via public APIs for these ecosystems.
Description
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.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 💎RubyGems | katello | all versions | 4.19.1bundle update katello --conservative |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for katello, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update katello to 4.19.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-4324 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2026-4324 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2026-4324. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
This flaw in the Katello plugin for Red Hat Satellite allows an attacker to inject arbitrary SQL commands into the `/api/hosts/bootc_images` API endpoint. By manipulating the `sort_by` parameter, an attacker could trigger database errors, cause a Denial of Service, or potentially perform Boolean-based Blind SQL…
| Product | Fixed in | Advisory |
|---|---|---|
| Red Hat Satellite 6.17 for RHEL 9 | foreman-0:3.14.0.14-1.el9sat | RHSA-2026:5970 |
| Red Hat Satellite 6.18 for RHEL 9 | rubygem-katello-0:4.18.0.9-1.el9sat | RHSA-2026:5968 |
| Red Hat Satellite 6.19 for RHEL 9 | rubygem-katello-0:4.20.0.4-1.el9sat | RHSA-2026:22326 |
Frequently Asked Questions
Is CVE-2026-4324 in your dependencies?
O3 Security finds CVE-2026-4324 across RubyGems dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.