Riskcovery

CVE-2026-42151

Prometheus Azure AD remote write OAuth client secret exposed via config API

State
Published
Severity
7.5 High
Published
May 4, 2026
Updated
Sep 10, 2026
Reserved
Apr 24, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.17.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NGitHub_M
3.17.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nredhat-SADP

Weaknesses

  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
  • CWE-312 Cleartext Storage of Sensitive Information
  • CWE-256 Plaintext Storage of a Password

Affected Products

ProductVersions
prometheusprometheus
  • < 3.5.3Affected
  • >= 3.6.0, < 3.11.3Affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.