CVE-2026-75889 (GCVE-0-2026-75889)
Vulnerability from cvelistv5
Published
2026-08-27 17:22
Modified
2026-08-28 16:55
Summary
Grafana Alloy’s prometheus.operator.servicemonitors component allows a user who can create or modify ServiceMonitor resources in a watched namespace to specify an arbitrary local file through bearerTokenFile. Alloy reads the file and sends its contents as a bearer token to an attacker-controlled scrape endpoint. This may disclose files accessible to the Alloy process, including its projected Kubernetes service account token, potentially granting the attacker Alloy’s Kubernetes permissions. Exploitation requires ServiceMonitor write access and lower privileges than Alloy’s service account.
Impacted products
Vendor Product Version
Grafana Alloy Version: 1.0.0    1.18.1
Create a notification for this product.
Show details on NVD website


{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-75889",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-28T13:58:25.670440Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-552",
                "description": "CWE-552 Files or Directories Accessible to External Parties",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-28T16:55:05.074Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Alloy",
          "vendor": "Grafana",
          "versions": [
            {
              "lessThanOrEqual": "1.18.1",
              "status": "affected",
              "version": "1.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Trung Nguyen (@everping) of CyStack"
        }
      ],
      "datePublic": "2026-08-18T13:48:18.251Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Grafana Alloy\u2019s prometheus.operator.servicemonitors component allows a user who can create or modify ServiceMonitor resources in a watched namespace to specify an arbitrary local file through bearerTokenFile. Alloy reads the file and sends its contents as a bearer token to an attacker-controlled scrape endpoint. This may disclose files accessible to the Alloy process, including its projected Kubernetes service account token, potentially granting the attacker Alloy\u2019s Kubernetes permissions. Exploitation requires ServiceMonitor write access and lower privileges than Alloy\u2019s service account."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-27T17:22:38.284Z",
        "orgId": "57da9224-a3e2-4646-9d0e-c4dc2e05e7da",
        "shortName": "GRAFANA"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://grafana.com/security/security-advisories/cve-2026-75889"
        }
      ],
      "source": {
        "discovery": "EXTERNAL_REPORT"
      },
      "title": "CVE-2026-75889 CVE Record"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "57da9224-a3e2-4646-9d0e-c4dc2e05e7da",
    "assignerShortName": "GRAFANA",
    "cveId": "CVE-2026-75889",
    "datePublished": "2026-08-27T17:22:22.328Z",
    "dateReserved": "2026-08-18T13:48:17.836Z",
    "dateUpdated": "2026-08-28T16:55:05.074Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"cna\": {\"affected\": [{\"defaultStatus\": \"unaffected\", \"product\": \"Alloy\", \"vendor\": \"Grafana\", \"versions\": [{\"lessThanOrEqual\": \"1.18.1\", \"status\": \"affected\", \"version\": \"1.0.0\", \"versionType\": \"semver\"}]}], \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Trung Nguyen (@everping) of CyStack\"}], \"datePublic\": \"2026-08-18T13:48:18.251Z\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"Grafana Alloy\\u2019s prometheus.operator.servicemonitors component allows a user who can create or modify ServiceMonitor resources in a watched namespace to specify an arbitrary local file through bearerTokenFile. Alloy reads the file and sends its contents as a bearer token to an attacker-controlled scrape endpoint. This may disclose files accessible to the Alloy process, including its projected Kubernetes service account token, potentially granting the attacker Alloy\\u2019s Kubernetes permissions. Exploitation requires ServiceMonitor write access and lower privileges than Alloy\\u2019s service account.\"}], \"metrics\": [{\"cvssV3_1\": {\"baseScore\": 7.7, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N\", \"version\": \"3.1\"}}], \"providerMetadata\": {\"orgId\": \"57da9224-a3e2-4646-9d0e-c4dc2e05e7da\", \"shortName\": \"GRAFANA\", \"dateUpdated\": \"2026-08-27T17:22:38.284Z\"}, \"references\": [{\"tags\": [\"vendor-advisory\"], \"url\": \"https://grafana.com/security/security-advisories/cve-2026-75889\"}], \"source\": {\"discovery\": \"EXTERNAL_REPORT\"}, \"title\": \"CVE-2026-75889 CVE Record\"}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-75889\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-08-28T13:58:25.670440Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-552\", \"description\": \"CWE-552 Files or Directories Accessible to External Parties\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-08-28T14:06:58.212Z\"}}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-75889\", \"assignerOrgId\": \"57da9224-a3e2-4646-9d0e-c4dc2e05e7da\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"GRAFANA\", \"dateReserved\": \"2026-08-18T13:48:17.836Z\", \"datePublished\": \"2026-08-27T17:22:22.328Z\", \"dateUpdated\": \"2026-08-28T16:55:05.074Z\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.


Loading…

Loading…