VULNERABILITY INTELLIGENCE

CVE-2026-42151

CVSS score7.5 HIGH
EPSS probability0.35%
CISA KEVNot currently listed
Published2026-05-04
Last modified2026-09-10
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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.

Weakness classification

  • security-advisories@github.com: CWE-200
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-256

Primary references