CVE-2026-42151
Prometheus Azure AD remote write OAuth client secret exposed via config API
CVSS Score
7.5
EPSS Score
0.4%
EPSS Percentile
28th
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 | Jul 31, 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 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-42151 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2466507 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42151.json access.redhat.com: https://access.redhat.com/errata/RHSA-2026:41019 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:36796 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:34357 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:34359 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:47952 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:41030 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:44622 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:47149 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:36651 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:40945 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:40118 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:25039 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:25504 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:25245 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:40768 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:42146 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:43052 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:42796 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:41066 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:41031 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:40262 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:40974 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:40970 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:40972 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:36797 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:37272 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:37267 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:37271 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:42852