CVE-2026-42154

Prometheus · Prometheus

A vulnerability has been identified in Prometheus, an open-source monitoring system and time series database.

Executive summary

A high-severity security flaw in the Prometheus monitoring system could expose critical infrastructure to unauthorized access or manipulation.

Vulnerability

The vulnerability pertains to the core functionality of the Prometheus monitoring system and time series database. Administrators should review the vendor's security disclosures to understand the specific attack vector and authentication requirements.

Business impact

The CVSS score of 7.5 indicates a High-severity risk. Successful exploitation of a monitoring system could allow attackers to manipulate data, gain insights into internal network topology, or compromise the integrity of time-series telemetry used for critical decision-making.

Remediation

Immediate Action: Check the official Prometheus project security page for the latest stable release and upgrade immediately.

Proactive Monitoring: Review Prometheus query logs and audit trails for unauthorized access or unusual administrative activity.

Compensating Controls: Implement strict network segmentation and ensure Prometheus is not exposed to untrusted networks or the public internet.

Exploitation status

Public Exploit Available: false

Analyst recommendation

Prometheus is a cornerstone of operational visibility. Due to the high CVSS score, security teams must prioritize updating to the latest version to maintain the integrity of their monitoring infrastructure and prevent potential lateral movement by attackers.