FKIE_CVE-2026-21728

Vulnerability from fkie_nvd - Published: 2026-04-24 09:16 - Updated: 2026-06-30 03:17
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
Tempo queries with large limits can cause large memory allocations which can impact the availability of the service, depending on its deployment strategy. Mitigation can be done by setting max_result_limit in the search config, e.g. to 262144 (2^18).
References
security@grafana.comhttps://grafana.com/security/security-advisories/cve-2026-21728Broken Link
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:21769
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:22347
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:22423
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:23345
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:24503
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/security/cve/CVE-2026-21728
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://bugzilla.redhat.com/show_bug.cgi?id=2461395
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-21728.json
Impacted products
Vendor Product Version
grafana tempo *
grafana tempo *
grafana tempo *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Tempo",
          "vendor": "Grafana",
          "versions": [
            {
              "lessThan": "v2.11.0",
              "status": "affected",
              "version": "v1.3.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@grafana.com"
    },
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:/a:redhat:multicluster_globalhub:1.3::el9"
          ],
          "defaultStatus": "affected",
          "product": "Multicluster Global Hub 1.3.4",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:multicluster_globalhub:1.4::el9"
          ],
          "defaultStatus": "affected",
          "product": "Multicluster Global Hub 1.4.5",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:multicluster_globalhub:1.5::el9"
          ],
          "defaultStatus": "affected",
          "product": "Multicluster Global Hub 1.5.4",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:multicluster_globalhub:1.6::el9"
          ],
          "defaultStatus": "affected",
          "product": "Multicluster Global Hub 1.6.2",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:multicluster_globalhub:1.7::el9"
          ],
          "defaultStatus": "affected",
          "product": "Multicluster Global Hub 1.7.1",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:ceph_storage:5"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Ceph Storage 5",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:ceph_storage:6"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Ceph Storage 6",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:ceph_storage:9"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Ceph Storage 9",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:openshift_distributed_tracing:3"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat OpenShift distributed tracing 3",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:logging:6"
          ],
          "defaultStatus": "unaffected",
          "product": "Logging Subsystem for Red Hat OpenShift",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:multicluster_globalhub"
          ],
          "defaultStatus": "unaffected",
          "product": "Multicluster Global Hub",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:acm:2"
          ],
          "defaultStatus": "unaffected",
          "product": "Red Hat Advanced Cluster Management for Kubernetes 2",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:10"
          ],
          "defaultStatus": "unaffected",
          "product": "Red Hat Enterprise Linux 10",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:9"
          ],
          "defaultStatus": "unaffected",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat"
        }
      ],
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:grafana:tempo:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "AE74525D-4401-4907-BB5F-E4FD2595CA5E",
              "versionEndExcluding": "2.8.4",
              "versionStartIncluding": "1.3.0",
              "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": "Tempo queries with large limits can cause large memory allocations which can impact the availability of the service, depending on its deployment strategy.\n\nMitigation can be done by setting max_result_limit in the search config, e.g. to 262144 (2^18)."
    }
  ],
  "id": "CVE-2026-21728",
  "lastModified": "2026-06-30T03:17:24.707",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security@grafana.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-21728",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-04-24T11:29:58.649315Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-04-24T09:16:03.710",
  "references": [
    {
      "source": "security@grafana.com",
      "tags": [
        "Broken Link"
      ],
      "url": "https://grafana.com/security/security-advisories/cve-2026-21728"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/errata/RHSA-2026:21769"
    },
    {
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      "url": "https://access.redhat.com/errata/RHSA-2026:22347"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/errata/RHSA-2026:22423"
    },
    {
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      "url": "https://access.redhat.com/errata/RHSA-2026:23345"
    },
    {
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    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/security/cve/CVE-2026-21728"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2461395"
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    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-21728.json"
    }
  ],
  "sourceIdentifier": "security@grafana.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
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    {
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      ],
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "type": "Secondary"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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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