High 7.5Published May 4, 2026

CVE-2026-42151Prometheus Azure AD remote write OAuth client secret exposed via config API

Updated under an hour ago (Oct 26, 2026, 3:30 PM ET)

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It affects prometheus and 22 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-200, CWE-312, CWE-256
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Modified
Record last updated: Sep 10, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

prometheus prometheus prometheus:prometheus (from the name)	before 3.5.3; from 3.6.0, < 3.11.3	CNA record
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux	from 0:0.152.1-1.el10_2 not affected	CISA ADP
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support redhat:enterprise_linux_eus	from 0:0.152.1-1.el10_0 not affected	CISA ADP
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions redhat:rhel_e4s	from 0:0.152.1-1.el9_4 not affected	CISA ADP
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support redhat:rhel_eus	from 0:0.152.1-1.el9_6 not affected	CISA ADP
Red Hat RHEM 1.0 for RHEL 9 redhat:edge_manager	from 0:1.0.3-1.el9em not affected	CISA ADP
Red Hat Logging for Red Hat OpenShift 6 redhat:logging	from 1785418915 not affected	CISA ADP
Red Hat Multicluster Global Hub 1.4.5 redhat:multicluster_globalhub	from 1784060681 not affected	CISA ADP
Red Hat OpenShift File Integrity Operator - FIO 1 redhat:openshift_file_integrity_operator	from 1786439449 not affected	CISA ADP
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.11 redhat:acm	from 1787260378 not affected	CISA ADP
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References

References

https://github.com/prometheus/prometheus/security/advisories/GHSA-wg65-39gg-5wfj	x-refsource-confirm, vendor-advisory
https://github.com/prometheus/prometheus/pull/18587	x-refsource-misc, issue-tracking, patch
https://github.com/prometheus/prometheus/pull/18590	x-refsource-misc, issue-tracking, patch
https://github.com/prometheus/prometheus/releases/tag/v3.11.3	x-refsource-misc, release-notes
https://github.com/prometheus/prometheus/releases/tag/v3.5.3	x-refsource-misc, release-notes
https://access.redhat.com/errata/RHSA-2026:25039
https://access.redhat.com/errata/RHSA-2026:25245
https://access.redhat.com/errata/RHSA-2026:25504
https://access.redhat.com/errata/RHSA-2026:34357
https://access.redhat.com/errata/RHSA-2026:34359
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.