Prometheus is an open-source monitoring system and time series database. Prior to versions 3.5.3 and 3.11.3, the client_secret field in the Azure AD remote write OAuth configuration (storage/remote/azuread) was typed as string instead of Secret. Prometheus redacts fields of type Secret when serving the configuration via the /-/config HTTP API endpoint. Because the field was a plain string, the Azure OAuth client secret was exposed in plaintext to any user or process with access to that endpoint. This issue has been patched in versions 3.5.3 and 3.11.3.
History

Mon, 04 May 2026 20:45:00 +0000

Type Values Removed Values Added
First Time appeared Prometheus
Prometheus prometheus
Vendors & Products Prometheus
Prometheus prometheus

Mon, 04 May 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 04 May 2026 19:00:00 +0000

Type Values Removed Values Added
Description Prometheus is an open-source monitoring system and time series database. Prior to versions 3.5.3 and 3.11.3, the client_secret field in the Azure AD remote write OAuth configuration (storage/remote/azuread) was typed as string instead of Secret. Prometheus redacts fields of type Secret when serving the configuration via the /-/config HTTP API endpoint. Because the field was a plain string, the Azure OAuth client secret was exposed in plaintext to any user or process with access to that endpoint. This issue has been patched in versions 3.5.3 and 3.11.3.
Title Prometheus Azure AD remote write OAuth client secret exposed via config API
Weaknesses CWE-200
CWE-312
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-04T19:55:09.255Z

Reserved: 2026-04-24T17:15:21.835Z

Link: CVE-2026-42151

cve-icon Vulnrichment

Updated: 2026-05-04T19:54:59.725Z

cve-icon NVD

Status : Received

Published: 2026-05-04T19:16:04.220

Modified: 2026-05-04T19:16:04.220

Link: CVE-2026-42151

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-04T21:00:09Z