CVE-2026-42151 (GCVE-0-2026-42151)

Vulnerability from cvelistv5 – Published: 2026-05-04 18:12 – Updated: 2026-05-04 19:55
VLAI?
Title
Prometheus Azure AD remote write OAuth client secret exposed via config API
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 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.
Severity ?
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE
  • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
  • CWE-312 - Cleartext Storage of Sensitive Information
Assigner
References
Impacted products
Vendor Product Version
prometheus prometheus Affected: < 3.5.3
Affected: >= 3.6.0, < 3.11.3
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{
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        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-42151",
                "options": [
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                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
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                "role": "CISA Coordinator",
                "timestamp": "2026-05-04T19:54:39.314002Z",
                "version": "2.0.3"
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          "versions": [
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        }
      ],
      "metrics": [
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            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
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      "source": {
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        "discovery": "UNKNOWN"
      },
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    "dateReserved": "2026-04-24T17:15:21.835Z",
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    "state": "PUBLISHED"
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-05-07",
      "epss": "0.0001",
      "percentile": "0.0125"
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}


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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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