CVE-2026-42151

Prometheus · Prometheus

Prometheus, an open-source monitoring system, is affected by a security vulnerability that may impact its time-series database and monitoring operations.

Executive summary

A high-severity vulnerability in Prometheus could allow unauthorized actors to compromise monitoring data or system integrity.

Vulnerability

The vulnerability relates to the Prometheus monitoring and database engine. It may allow an attacker to bypass intended security controls or access sensitive monitoring metrics.

Business impact

The CVSS score of 7.5 indicates a high risk to the visibility and operational security of environments monitored by Prometheus. Compromise could result in the loss of critical telemetry data or the manipulation of system alerts, masking malicious activity occurring elsewhere in the infrastructure.

Remediation

Immediate Action: Update the Prometheus server to the latest stable release provided by the vendor.

Proactive Monitoring: Audit access logs for the Prometheus API and database queries to identify unauthorized or anomalous access requests.

Compensating Controls: Enforce strict network segmentation and implement mutual TLS (mTLS) to restrict access to the Prometheus administrative interface.

Exploitation status

Public Exploit Available: false

Analyst recommendation

Administrators must verify their current deployment version and apply the recommended security updates immediately. Protecting the integrity of monitoring systems is essential to maintaining overall situational awareness and incident response capabilities.