CVE-2026-42151
Prometheus Azure AD remote write OAuth client secret exposed via config API
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-200 CWE-312 |
| Vendor | prometheus |
| Product | prometheus |
| Ecosystems | |
| Industries | Technology |
| Published | May 4, 2026 |
| Last Updated | May 4, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
prometheus / prometheus
< 3.5.3 >= 3.6.0, < 3.11.3
References
github.com: https://github.com/prometheus/prometheus/security/advisories/GHSA-wg65-39gg-5wfj github.com: https://github.com/prometheus/prometheus/pull/18587 github.com: https://github.com/prometheus/prometheus/pull/18590 github.com: https://github.com/prometheus/prometheus/releases/tag/v3.11.3 github.com: https://github.com/prometheus/prometheus/releases/tag/v3.5.3