FKIE_CVE-2026-27878

Vulnerability from fkie_nvd - Published: 2026-06-19 19:16 - Updated: 2026-06-29 19:59
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
A TraceQL query in Grafana Tempo with a large exemplars hint value can cause the Tempo instance to allocate an excessive amount of memory, resulting in an out-of-memory crash. This could allow an authenticated user to trigger a denial of service against the Tempo service.
References
security@grafana.comhttps://grafana.com/security/security-advisories/cve-2026-27878Broken Link
Impacted products
Vendor Product Version
grafana tempo *
grafana tempo *
grafana tempo *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Enterprise Traces (GET)",
          "vendor": "Grafana",
          "versions": [
            {
              "lessThan": "2.8.8",
              "status": "affected",
              "version": "2.6.1",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Tempo",
          "vendor": "Grafana",
          "versions": [
            {
              "lessThan": "2.10.2",
              "status": "affected",
              "version": "2.6.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@grafana.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:grafana:tempo:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "1A53B8B4-874B-40F7-83F6-A36965D9B2C0",
              "versionEndExcluding": "2.8.4",
              "versionStartIncluding": "2.6.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:grafana:tempo:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4F731ED3-2882-414C-B5FE-679B76A751A4",
              "versionEndExcluding": "2.9.2",
              "versionStartIncluding": "2.9.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:grafana:tempo:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "A90B7E68-DFF4-449F-A145-C1ABB0184B2E",
              "versionEndExcluding": "2.10.2",
              "versionStartIncluding": "2.10.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A TraceQL query in Grafana Tempo with a large exemplars hint value can cause the Tempo instance to allocate an excessive amount of memory, resulting in an out-of-memory crash. This could allow an authenticated user to trigger a denial of service against the Tempo service."
    }
  ],
  "id": "CVE-2026-27878",
  "lastModified": "2026-06-29T19:59:27.563",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "security@grafana.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-27878",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-22T17:09:51.414285Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-19T19:16:34.897",
  "references": [
    {
      "source": "security@grafana.com",
      "tags": [
        "Broken Link"
      ],
      "url": "https://grafana.com/security/security-advisories/cve-2026-27878"
    }
  ],
  "sourceIdentifier": "security@grafana.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}


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Detection rules are retrieved from Rulezet.