FKIE_CVE-2026-28377

Vulnerability from fkie_nvd - Published: 2026-03-26 22:16 - Updated: 2026-03-31 19:00
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Summary
A vulnerability in Grafana Tempo exposes the S3 SSE-C encryption key in plaintext through the /status/config endpoint, potentially allowing unauthorized users to obtain the key used to encrypt trace data stored in S3. Thanks to william_goodfellow for reporting this vulnerability.
References
security@grafana.comhttps://grafana.com/security/security-advisories/cve-2026-28377Vendor Advisory
Impacted products
Vendor Product Version
grafana tempo *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:grafana:tempo:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B1FEA69C-8014-4D65-AFA0-5C44DF250663",
              "versionEndExcluding": "2.10.3",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability in Grafana Tempo exposes the S3 SSE-C encryption key in plaintext through the /status/config endpoint, potentially allowing unauthorized users to obtain the key used to encrypt trace data stored in S3.\n\nThanks to william_goodfellow for reporting this vulnerability."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad en Grafana Tempo expone la clave de cifrado S3 SSE-C en texto plano a trav\u00e9s del endpoint /status/config, lo que podr\u00eda permitir a usuarios no autorizados obtener la clave utilizada para cifrar los datos de traza almacenados en S3.\n\nGracias a william_goodfellow por informar sobre esta vulnerabilidad."
    }
  ],
  "id": "CVE-2026-28377",
  "lastModified": "2026-03-31T19:00:15.610",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "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",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security@grafana.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-26T22:16:28.460",
  "references": [
    {
      "source": "security@grafana.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://grafana.com/security/security-advisories/cve-2026-28377"
    }
  ],
  "sourceIdentifier": "security@grafana.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-326"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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