FKIE_CVE-2026-21728

Vulnerability from fkie_nvd - Published: 2026-04-24 09:16 - Updated: 2026-10-26 21:10
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). Alternatively, automatically restart the service.
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": [
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          "defaultStatus": "unaffected",
          "product": "Tempo",
          "vendor": "Grafana",
          "versions": [
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              "versionType": "semver"
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              "versionType": "semver"
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              "status": "affected",
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              "versionType": "semver"
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          "product": "Enterprise Traces (GET)",
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          "versions": [
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              "status": "affected",
              "version": "1.0.0",
              "versionType": "semver"
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          "vendor": "Red Hat"
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          "vendor": "Red Hat"
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          "vendor": "Red Hat"
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          "packageName": "rhosdt/tempo-rhel9-operator",
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          "vendor": "Red Hat"
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      ],
      "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",
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            },
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              "matchCriteriaId": "4F731ED3-2882-414C-B5FE-679B76A751A4",
              "versionEndExcluding": "2.9.2",
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          "negate": false,
          "operator": "OR"
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  ],
  "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). Alternatively, automatically restart the service."
    },
    {
      "lang": "es",
      "value": "Las consultas de Tempo con l\u00edmites grandes pueden causar grandes asignaciones de memoria, lo que puede impactar la disponibilidad del servicio, dependiendo de su estrategia de despliegue.\n\nLa mitigaci\u00f3n se puede realizar configurando max_result_limit en la configuraci\u00f3n de b\u00fasqueda, por ejemplo, a 262144 (2^18)."
    }
  ],
  "id": "CVE-2026-21728",
  "lastModified": "2026-10-26T21:10:00.170",
  "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"
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        "impactScore": 3.6,
        "source": "security@grafana.com",
        "type": "Secondary"
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          "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",
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        "ssvcData": {
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          "options": [
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              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-04-24T11:29:58.649315Z",
          "version": "2.0.3"
        }
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  "published": "2026-04-24T09:16:03.710",
  "references": [
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      "tags": [
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  "vulnStatus": "Modified",
  "weaknesses": [
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          "value": "CWE-400"
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}



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