CVE-2026-9073: Foreman-mcp-server Sensitive Data Logging Vulnerability (CVSS 6.2)

Technical summary

CVE-2026-9073 stems from inadequate redaction in foreman-mcp-server's dual logging pipelines. The first logging mechanism treats session IDs—which serve as authentication credentials—as benign informational data and logs them without masking. The second mechanism, activated during debug logging, fails to fully sanitize HTTP request headers before persistence, allowing Authorization headers and API key parameters to be captured in cleartext. Both issues result in sensitive credentials being written to container logs, potentially increasing exposure surface if logs are aggregated or retained in shared platforms.

Business impact

If foreman-mcp-server instances are deployed in containerized environments with log aggregation, compromised credentials could allow attackers to impersonate legitimate users or applications, leading to unauthorized access to Foreman/Satellite infrastructure and managed resources. In Red Hat Satellite deployments, this may permit unauthorized configuration changes, certificate manipulation, or lateral movement. The risk is amplified in multi-tenant or shared logging platforms where log viewers have broad access.

Affected systems

Red Hat Satellite and The Foreman deployments that include foreman-mcp-server, particularly those with container-based logging infrastructure. Organizations running debug logging or shipping container logs to centralized platforms face elevated exposure.

Exploitability

This vulnerability requires local or log-access privileges to extract credentials from logs; it is not directly remotely exploitable. However, the barrier to exploitation depends on logging infrastructure: if logs are accessible via standard SIEM dashboards, log aggregation APIs, or shared storage without encryption, attackers with those access paths can readily recover plaintext credentials. It is not listed in the CISA Known Exploited Vulnerabilities catalog.

Remediation

Upgrade foreman-mcp-server to a patched version that sanitizes session identifiers and HTTP headers before logging. Verify patch availability from Red Hat advisories for Satellite and The Foreman project. In the interim, restrict debug logging to development/test environments, minimize log retention, encrypt logs in transit and at rest, and enforce strict access controls on logging infrastructure.

Patch guidance

Monitor Red Hat Security Advisories and The Foreman project release notes for patched versions of foreman-mcp-server. Apply patches to all Satellite and Foreman deployments once available. Verify that the patched version includes redaction of session IDs and proper sanitization of HTTP headers in both standard and debug logging modes. Test patches in non-production environments before production rollout.

Detection guidance

Audit existing logs for plaintext session identifiers and Authorization headers using pattern matching (e.g., regex for Bearer tokens, API key formats). Search logs for debug-level entries containing HTTP headers. Review container log configurations and log forwarding destinations to identify which systems have access. Monitor for any indicators of credential misuse stemming from known Foreman/Satellite instances. Correlate log access events with authentication anomalies.

Why prioritize this

Although the CVSS score is medium (6.2), the risk should be contextualized: organizations with centralized logging, large attack surfaces, or sensitive environments (production infrastructure management) should prioritize this higher. The ease of extracting credentials from logs once access is gained elevates practical risk. Conversely, organizations with isolated, restricted logging systems can defer patches slightly longer while monitoring for interim compensating controls.

Risk score, explained

CVSS 6.2 reflects a confidentiality-only impact (C:H) with local or log-system access requirements (AV:L, PR:N, AC:L). The score does not account for organizational log architecture or credential blast radius; security teams should adjust priority based on whether logs are centralized, encrypted, and access-controlled.

Frequently asked questions