CVE-2026-4324: Red Hat Satellite SQLi Vulnerability

CVE-2026-4324 Overview

A SQL injection vulnerability has been identified in the Katello plugin for Red Hat Satellite. This flaw stems from improper sanitization of user-provided input in the sort_by parameter of the /api/hosts/bootc_images API endpoint. A remote authenticated attacker can exploit this vulnerability to inject arbitrary SQL commands, potentially leading to Denial of Service (DoS) conditions through database errors or enabling Boolean-based Blind SQL injection attacks that could extract sensitive information from the database.

Critical Impact

Remote attackers with low privileges can exploit this SQL injection to cause service disruption or extract sensitive database information through blind SQL injection techniques.

Affected Products

• Katello plugin for Red Hat Satellite
• Red Hat Satellite (versions using vulnerable Katello plugin)

Discovery Timeline

• 2026-03-17 - CVE-2026-4324 published to NVD
• 2026-03-17 - Last updated in NVD database

Technical Details for CVE-2026-4324

Vulnerability Analysis

This vulnerability is classified as CWE-89 (SQL Injection), representing a critical category of injection flaws that occur when untrusted data is sent to an interpreter as part of a command or query. In the context of CVE-2026-4324, the Katello plugin fails to properly validate and sanitize user-supplied input within the sort_by parameter before incorporating it into SQL queries executed against the backend database.

The attack can be executed remotely over the network and requires only low-level privileges (authenticated access) to exploit. No user interaction is required, making this vulnerability particularly concerning for organizations running affected Red Hat Satellite deployments.

Root Cause

The root cause of this vulnerability lies in improper input sanitization within the Katello plugin's API endpoint handler. When processing requests to /api/hosts/bootc_images, the application directly incorporates the sort_by parameter value into database queries without adequate validation or parameterization. This allows attackers to break out of the intended query context and inject malicious SQL statements.

Attack Vector

The vulnerability is exploitable via the network through the REST API endpoint /api/hosts/bootc_images. An authenticated attacker can craft malicious requests containing SQL injection payloads in the sort_by parameter. The attack follows two primary exploitation paths:

1. Denial of Service: Injecting SQL syntax that causes database errors, disrupting normal service operation
2. Boolean-based Blind SQL Injection: Using conditional SQL statements to extract database information one bit at a time through observable differences in application responses

The attack mechanism involves manipulating the ORDER BY clause typically associated with sorting parameters, allowing injection of subqueries or conditional statements that reveal database content through timing or response differences.

Detection Methods for CVE-2026-4324

Indicators of Compromise

• Unusual or malformed requests to the /api/hosts/bootc_images endpoint containing SQL keywords in the sort_by parameter
• Database error logs showing SQL syntax errors originating from API queries
• Abnormal patterns of API requests with varying sort_by values indicative of blind SQL injection enumeration
• Unexpected database query execution times suggesting time-based injection attempts

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block SQL injection patterns in API parameters
• Monitor application logs for requests containing SQL keywords such as UNION, SELECT, OR, AND, single quotes, or semicolons in the sort_by parameter
• Deploy database activity monitoring to detect unusual query patterns or error rates
• Configure intrusion detection systems (IDS) to alert on SQL injection signature patterns targeting Red Hat Satellite APIs

Monitoring Recommendations

• Enable verbose logging on the Red Hat Satellite API endpoints to capture full request details
• Set up alerting for repeated 500-series HTTP errors from the /api/hosts/bootc_images endpoint
• Monitor database performance metrics for anomalous query execution patterns
• Review authentication logs for accounts making suspicious API requests

How to Mitigate CVE-2026-4324

Immediate Actions Required

• Review access controls and restrict API access to the /api/hosts/bootc_images endpoint to only trusted users and systems
• Implement input validation at the network perimeter using WAF rules to block SQL injection attempts
• Audit recent API access logs for signs of exploitation attempts
• Consider temporarily disabling the vulnerable endpoint if not critical to operations until patches are available

Patch Information

Red Hat has acknowledged this vulnerability. For the latest patch information and security updates, consult the Red Hat CVE-2026-4324 Advisory and Red Hat Bugzilla #2448349. Apply vendor-supplied patches as soon as they become available following your organization's change management procedures.

Workarounds

• Implement network-level access controls to restrict access to the Red Hat Satellite API from trusted IP ranges only
• Deploy a Web Application Firewall with SQL injection detection rules in front of the Red Hat Satellite instance
• Use API gateway solutions to implement additional input validation and rate limiting on the affected endpoint
• Consider implementing database-level query restrictions or read-only database users for the application where feasible

# Example WAF rule to block SQL injection in sort_by parameter
# ModSecurity rule example for Apache/Nginx
SecRule ARGS:sort_by "@detectSQLi" \
    "id:100001,\
    phase:2,\
    deny,\
    status:403,\
    log,\
    msg:'SQL Injection attempt detected in sort_by parameter',\
    tag:'CVE-2026-4324'"