--- id: CVE-2026-42151 title: Prometheus is an open-source monitoring system and time series database summary: >- 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… severity: high cvss: 7.5 cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N' cwe: - CWE-200 - CWE-312 - CWE-256 vendor: prometheus product: prometheus affected: - 'prometheus >= 2.48.0, < 3.5.3' - 'prometheus >= 3.6.0, < 3.11.3' patched: - prometheus 3.11.3 published: '2026-05-04' updated: '2026-09-10' sourceUpdated: '2026-09-10T13:20:06.057' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-42151' references: - url: 'https://github.com/prometheus/prometheus/pull/18587' label: security-advisories@github.com - url: 'https://github.com/prometheus/prometheus/pull/18590' label: security-advisories@github.com - url: 'https://github.com/prometheus/prometheus/releases/tag/v3.11.3' label: security-advisories@github.com - url: 'https://github.com/prometheus/prometheus/releases/tag/v3.5.3' label: security-advisories@github.com - url: >- https://github.com/prometheus/prometheus/security/advisories/GHSA-wg65-39gg-5wfj label: security-advisories@github.com - url: 'https://access.redhat.com/errata/RHSA-2026:25039' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:25245' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:25504' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:34357' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:34359' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:36651' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:36796' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:36797' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:37267' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - 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url: 'https://access.redhat.com/errata/RHSA-2026:60386' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:60387' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:60388' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:60389' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:60390' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:60391' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:60441' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:60477' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:63103' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/security/cve/CVE-2026-42151' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2466507' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42151.json label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-42151' - url: 'https://github.com/advisories/GHSA-wg65-39gg-5wfj' - url: 'https://github.com/prometheus/prometheus' tags: - nvd - cve.org - ghsa - go - osv ssvc: exploitation: none automatable: 'yes' technicalImpact: partial timestamp: '2026-05-04T19:54:39.314002Z' epss: 0.00412 epssPercentile: 0.32736 aliases: - GHSA-wg65-39gg-5wfj - BIT-prometheus-2026-42151 - GO-2026-5710 ecosystem: go ingestedAt: '2026-07-02T12:34:40.539Z' --- ## Overview 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. ## Affected - `prometheus >= 2.48.0, < 3.5.3` - `prometheus >= 3.6.0, < 3.11.3` ## Remediation Upgrade past the affected range: - `prometheus 3.11.3` ## Package advisory (CVE-2026-42151) Affected packages: - `github.com/prometheus/prometheus >= 0.45.2, < 0.311.3` Patched in: - `github.com/prometheus/prometheus 0.311.3` Source: https://github.com/advisories/GHSA-wg65-39gg-5wfj