Information Exposure Affecting prometheus package, versions <3.5.3+ds1-1


Severity

Recommended
low

Based on Debian security rating.

Threat Intelligence

EPSS
0.35% (28th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-PROMETHEUS-16434439
  • published6 May 2026
  • disclosed4 May 2026

Introduced: 4 May 2026

CVE-2026-42151  (opens in a new tab)
CWE-200  (opens in a new tab)
CWE-312  (opens in a new tab)

How to fix?

Upgrade Debian:unstable prometheus to version 3.5.3+ds1-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream prometheus package and not the prometheus package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

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.

References

CVSS Base Scores

version 3.1