Threat Advisory

High Severity Vulnerabilities Impacting Prometheus Monitoring Infrastructure

Threat: Vulnerability
Targeted Region: Global
Targeted Sector: Technology & IT
Criticality: High
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EXECUTIVE SUMMARY:

Reseacher has been identified as having two high-severity vulnerabilities that impact system stability and data confidentiality. These flaws, which both carry a CVSS score of 7.5, involve uncontrolled resource consumption and the improper handling of sensitive configuration data. If exploited, these issues can lead to a complete service outage or the exposure of administrative credentials used for cloud integrations. Organizations utilizing this software must prioritize updates to ensure that their monitoring infrastructure remains resilient against unauthenticated network-based attacks.[/subscribe_to_unlock_form]

EXECUTIVE SUMMARY:

Reseacher has been identified as having two high-severity vulnerabilities that impact system stability and data confidentiality. These flaws, which both carry a CVSS score of 7.5, involve uncontrolled resource consumption and the improper handling of sensitive configuration data. If exploited, these issues can lead to a complete service outage or the exposure of administrative credentials used for cloud integrations. Organizations utilizing this software must prioritize updates to ensure that their monitoring infrastructure remains resilient against unauthenticated network-based attacks.[emaillocker id="1283"]

  • CVE-2026-42154: This vulnerability involves uncontrolled resource consumption within the remote read endpoint. An unauthenticated attacker can provide a crafted snappy-compressed request body that lacks validation for declared decoded length, leading to massive heap memory allocation. This allows a remote actor to exhaust available system memory and crash the application process through concurrent requests, resulting in a persistent denial of service. The CVSS score of 7.5 reflects a high availability impact with low attack complexity.
  • CVE-2026-42151: This flaw involves the exposure of sensitive information due to improper data typing within the Azure active directory remote write configuration. Because a specific authentication field was defined as a standard string rather than a protected secret type, it bypasses the application's automated redaction mechanisms. Consequently, any entity with access to the configuration endpoint can view cloud service client secrets in plaintext, compromising integrated cloud environment security. The CVSS score of 7.5 highlights the high confidentiality risk associated with this misconfiguration.

The identified risks necessitate immediate remediation to prevent resource exhaustion and credential theft. Ensuring that internal endpoints are properly secured and that the software is running on a version that enforces strict memory validation and secret redaction is critical for maintaining a secure operational posture.

RECOMMENDATION:

  • We recommend you to update Prometheus to version 3.11.3 or later.

REFERENCES:

The following reports contain further technical details:
https://github.com/advisories/GHSA-8rm2-7qqf-34qm
https://github.com/advisories/GHSA-wg65-39gg-5wfj

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