CVE-2026-42151

Aliases:GHSA-wg65-39gg-5wfjBIT-prometheus-2026-42151GO-2026-5710
Advisory lineage Upstream: 0 Downstream: 12
Analyzed
Published: 04 May 2026, 18:12
Last modified:22 Jul 2026, 12:08

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
v3.1 (cve.org)
EPSS Score
0.33% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

04 May 2026, 18:12
Published
Vulnerability first disclosed
22 Jul 2026, 12:08
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Trends

Current EPSS score: 0.33%• Percentile: 24%

Techniques & Countermeasures

  • CWE-200•Exposure of Sensitive Information to an Unauthorized Actor

    The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

  • CWE-312•Cleartext Storage of Sensitive Information

    The product stores sensitive information in cleartext within a resource that might be accessible to another control sphere.

  • CWE-256•Plaintext Storage of a Password

    The product stores a password in plaintext within resources such as memory or files.

Affected Systems

  • github.com/prometheus•prometheus

    ≥ 0.45.2, < 0.311.3

  • prometheus•prometheus

    ≥ 2.48.0, < 3.5.3 | < 3.5.3 | ≥ 3.6.0, < 3.11.3

References (35)