CVE-2026-42151: Prometheus Azure AD remote write OAuth client secret exposed via config API

Overview

Severity

High (CVSS 7.5)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploit Status

Not Exploited

Patch Tuesday

2026-May

Released

2026-05-07

Last Updated

2026-06-03

EPSS Score

0.25% (percentile: 15.9%)

Affected Products (3)

Open Source Software

• cbl2 prometheus 2.37.9-7 on CBL Mariner 2.0
• azl3 telegraf 1.31.0-19 on Azure Linux 3.0

Other

• 21395-17084

Revision History

• 2026-05-07: Information published.
• 2026-05-13: Information published.
• 2026-06-03: Information published.