Detections
Analytics
CVE-2026-42151
high
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.
References
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42151.json
https://github.com/prometheus/prometheus/security/advisories/GHSA-wg65-39gg-5wfj
https://github.com/prometheus/prometheus/releases/tag/v3.5.3
https://github.com/prometheus/prometheus/releases/tag/v3.11.3
https://github.com/prometheus/prometheus/pull/18590
https://github.com/prometheus/prometheus/pull/18587
https://bugzilla.redhat.com/show_bug.cgi?id=2466507
https://access.redhat.com/security/cve/CVE-2026-42151
https://access.redhat.com/errata/RHSA-2026:37272
https://access.redhat.com/errata/RHSA-2026:37271
https://access.redhat.com/errata/RHSA-2026:37267
https://access.redhat.com/errata/RHSA-2026:36797
https://access.redhat.com/errata/RHSA-2026:36796
https://access.redhat.com/errata/RHSA-2026:36651
https://access.redhat.com/errata/RHSA-2026:34359
https://access.redhat.com/errata/RHSA-2026:34357
https://access.redhat.com/errata/RHSA-2026:25504