Information disclosure in Prometheus

CVE-2026-42151

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 S…

Vulnerability class: Information Disclosure

EPSS: 0.000 (1.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

  • Prometheus — versions < 3.5.3, >= 3.6.0, < 3.11.3

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-42151?
CVE-2026-42151 is a high-severity vulnerability in Prometheus, classified under Information Disclosure. CVSS score: 7.5/10. Published 2026-05-04.
How severe is CVE-2026-42151?
High severity. CVSS v3 base score is 7.5 out of 10.