CVE-2026-42151

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.

CVSS Metrics

• v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Trends

Current EPSS score: 0.35%• Percentile: 29%

Techniques & Countermeasures

• CWE-200•Exposure of Sensitive Information to an Unauthorized Actor

  The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

• CWE-312•Cleartext Storage of Sensitive Information

  The product stores sensitive information in cleartext within a resource that might be accessible to another control sphere.

• CWE-256•Plaintext Storage of a Password

  The product stores a password in plaintext within resources such as memory or files.

Affected Systems

• chainguard•agentbeat

  < 9.2.7-r8

• chainguard•agentbeat-fips

  < 9.2.7-r9

• chainguard•amazon-cloudwatch-agent

  all

• chainguard•amazon-cloudwatch-agent-fips

  all

• chainguard•amazon-cloudwatch-agent-operator

  < 3.5.0-r5

• chainguard•amazon-cloudwatch-agent-operator-fips

  < 3.5.0-r4

• chainguard•aws-otel-collector

  < 0.49.0-r0

• chainguard•aws-otel-collector-fips

  < 0.49.0-r0

• chainguard•certificate-transparency

  all

• chainguard•certificate-transparency-fips-trillian-ctserver

  < 1.3.3-r15

• chainguard•certificate-transparency-trillian-ctserver

  < 1.3.3-r13

• chainguard•cloud-sql-proxy-2.16

  < 2.16.0-r20

• chainguard•cloud-sql-proxy-2.17

  < 2.17.1-r23

• chainguard•cloud-sql-proxy-2.18

  < 2.18.3-r10

• chainguard•cloud-sql-proxy-2.21

  < 2.21.3-r4

• chainguard•cloud-sql-proxy-2.22

  < 2.22.1-r1

• chainguard•cloud-sql-proxy-2.23

  < 2.23.0-r0

• chainguard•cloud-sql-proxy-fips

  < 2.23.0-r0

• chainguard•cloudzero-collector

  < 1.2.11-r3

• chainguard•cloudzero-collector-fips

  < 1.2.11-r1

• chainguard•cloudzero-regurgitator

  < 1.2.11-r3

• chainguard•cloudzero-regurgitator-fips

  < 1.2.11-r1

• chainguard•cloudzero-shipper

  < 1.2.11-r3

• chainguard•cloudzero-shipper-fips

  < 1.2.11-r1

• chainguard•cloudzero-webhook

  < 1.2.11-r3

• chainguard•cloudzero-webhook-fips

  < 1.2.11-r1

• chainguard•commercial-grafana-11.6

  all

• chainguard•commercial-grafana-12.1

  all

• chainguard•commercial-grafana-12.2

  all

• chainguard•commercial-grafana-12.3

  all

• chainguard•commercial-grafana-12.4

  < 12.4.10-r0

• chainguard•commercial-grafana-13.0

  all

• chainguard•commercial-grafana-13.1

  < 13.1.0-r0

• chainguard•cortex

  all

• chainguard•cortex-fips

  all

• chainguard•cortex-geomys-fips

  all

• chainguard•datadog-agent-7.71-full

  all

• chainguard•datadog-agent-7.72-full

  all

• chainguard•datadog-agent-7.73-full

  all

• chainguard•datadog-agent-7.74-full

  all

• chainguard•datadog-agent-7.75

  all

• chainguard•datadog-agent-7.75-full

  all

• chainguard•datadog-agent-7.76

  all

• chainguard•datadog-agent-7.76-full

  all

• chainguard•datadog-agent-7.77

  < 7.77.3-r22

• chainguard•datadog-agent-7.77-full

  < 7.77.3-r22

• chainguard•datadog-agent-7.78

  < 7.78.4-r15

• chainguard•datadog-agent-7.78-full

  < 7.78.4-r15

• chainguard•datadog-agent-7.79

  < 0

• chainguard•datadog-agent-7.79-full

  < 0

Showing first 50 affected entries in server-rendered view.

References (64)

• https://github.com/prometheus/prometheus/security/advisories/GHSA-wg65-39gg-5wfj
• https://github.com/prometheus/prometheus/pull/18587
• https://github.com/prometheus/prometheus/pull/18590
• https://github.com/prometheus/prometheus/releases/tag/v3.11.3
• https://github.com/prometheus/prometheus/releases/tag/v3.5.3
• https://nvd.nist.gov/vuln/detail/CVE-2026-42151
• https://github.com/prometheus/prometheus
• https://access.redhat.com/security/cve/CVE-2026-42151
• https://bugzilla.redhat.com/show_bug.cgi?id=2466507
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42151.json
• https://access.redhat.com/errata/RHSA-2026:25039
• https://access.redhat.com/errata/RHSA-2026:25504
• https://access.redhat.com/errata/RHSA-2026:25245
• https://access.redhat.com/errata/RHSA-2026:34357
• https://access.redhat.com/errata/RHSA-2026:34359
• https://access.redhat.com/errata/RHSA-2026:36796
• https://access.redhat.com/errata/RHSA-2026:36651
• https://access.redhat.com/errata/RHSA-2026:36797
• https://access.redhat.com/errata/RHSA-2026:37271
• https://access.redhat.com/errata/RHSA-2026:37272
• https://access.redhat.com/errata/RHSA-2026:37267
• https://access.redhat.com/errata/RHSA-2026:41019
• https://access.redhat.com/errata/RHSA-2026:41030
• https://access.redhat.com/errata/RHSA-2026:40945
• https://access.redhat.com/errata/RHSA-2026:40118
• https://access.redhat.com/errata/RHSA-2026:41031
• https://access.redhat.com/errata/RHSA-2026:41066
• https://access.redhat.com/errata/RHSA-2026:40262
• https://access.redhat.com/errata/RHSA-2026:40974
• https://access.redhat.com/errata/RHSA-2026:40970
• https://access.redhat.com/errata/RHSA-2026:40972
• https://access.redhat.com/errata/RHSA-2026:40768
• https://access.redhat.com/errata/RHSA-2026:42146
• https://access.redhat.com/errata/RHSA-2026:42852
• https://access.redhat.com/errata/RHSA-2026:42796
• https://access.redhat.com/errata/RHSA-2026:53413
• https://access.redhat.com/errata/RHSA-2026:53412
• https://access.redhat.com/errata/RHSA-2026:53415
• https://access.redhat.com/errata/RHSA-2026:50843
• https://access.redhat.com/errata/RHSA-2026:47952
• https://access.redhat.com/errata/RHSA-2026:47149
• https://access.redhat.com/errata/RHSA-2026:53530
• https://access.redhat.com/errata/RHSA-2026:43052
• https://access.redhat.com/errata/RHSA-2026:50874
• https://access.redhat.com/errata/RHSA-2026:44622
• https://access.redhat.com/errata/RHSA-2026:54288
• https://access.redhat.com/errata/RHSA-2026:54427
• https://images.redhat.com/
• https://access.redhat.com/security/updates/classification/
• https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_25504.json
• https://www.cve.org/CVERecord?id=CVE-2026-42151
• https://security-tracker.debian.org/tracker/CVE-2026-42151
• https://access.redhat.com/errata/RHSA-2026:56340
• https://access.redhat.com/errata/RHSA-2026:57191
• https://access.redhat.com/errata/RHSA-2026:60387
• https://access.redhat.com/errata/RHSA-2026:60390
• https://access.redhat.com/errata/RHSA-2026:60388
• https://access.redhat.com/errata/RHSA-2026:60389
• https://access.redhat.com/errata/RHSA-2026:60391
• https://access.redhat.com/errata/RHSA-2026:60386
• https://access.redhat.com/errata/RHSA-2026:60477
• https://access.redhat.com/errata/RHSA-2026:60441
• https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42151.json
• https://access.redhat.com/errata/RHSA-2026:63103