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.
Published: 2026-08-27
Score: 7.7 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Fri, 28 Aug 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


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'}


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

Updated: 2026-08-28T14:06:58.212Z

cve-icon NVD

Status : Received

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

Modified: 2026-08-28T16:18:25.740

Link: CVE-2026-75889

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

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

Weaknesses
  • CWE-200

    Exposure of Sensitive Information to an Unauthorized Actor

  • CWE-284

    Improper Access Control