Grafana Alloy’s prometheus.operator.servicemonitors component allows a user who can create or modify ServiceMonitor resources in a watched namespace to specify an arbitrary local file through bearerTokenFile. Alloy reads the file and sends its contents as a bearer token to an attacker-controlled scrape endpoint. This may disclose files accessible to the Alloy process, including its projected Kubernetes service account token, potentially granting the attacker Alloy’s Kubernetes permissions. Exploitation requires ServiceMonitor write access and lower privileges than Alloy’s service account.
Advisories

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Fixes

Solution

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Workaround

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History

Fri, 28 Aug 2026 08:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-200
CWE-284

Fri, 28 Aug 2026 07:30:00 +0000

Type Values Removed Values Added
First Time appeared Grafana
Grafana alloy
Vendors & Products Grafana
Grafana alloy

Thu, 27 Aug 2026 18:00:00 +0000

Type Values Removed Values Added
Description Grafana Alloy’s prometheus.operator.servicemonitors component allows a user who can create or modify ServiceMonitor resources in a watched namespace to specify an arbitrary local file through bearerTokenFile. Alloy reads the file and sends its contents as a bearer token to an attacker-controlled scrape endpoint. This may disclose files accessible to the Alloy process, including its projected Kubernetes service account token, potentially granting the attacker Alloy’s Kubernetes permissions. Exploitation requires ServiceMonitor write access and lower privileges than Alloy’s service account.
Title CVE-2026-75889 CVE Record
References
Metrics cvssV3_1

{'score': 7.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GRAFANA

Published:

Updated: 2026-08-28T14:13:54.660Z

Reserved: 2026-08-18T13:48:17.836Z

Link: CVE-2026-75889

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-27T20:18:37.980

Modified: 2026-08-27T20:18:37.980

Link: CVE-2026-75889

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-28T08:00:13Z

Weaknesses