FKIE_CVE-2026-21728

Vulnerability from fkie_nvd - Published: 2026-04-24 09:16 - Updated: 2026-09-09 13:18
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": [
    {
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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",
              "version": "2.10.0",
              "versionType": "semver"
            }
          ]
        },
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          "product": "Enterprise Traces (GET)",
          "vendor": "Grafana",
          "versions": [
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              "status": "affected",
              "version": "1.0.0",
              "versionType": "semver"
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  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:grafana:tempo:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "AE74525D-4401-4907-BB5F-E4FD2595CA5E",
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          "operator": "OR"
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  "cveTags": [],
  "descriptions": [
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      "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."
    }
  ],
  "id": "CVE-2026-21728",
  "lastModified": "2026-09-09T13:18:44.397",
  "metrics": {
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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",
          "version": "3.1"
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        "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",
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            {
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          "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",
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      "tags": [
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}



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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.
  • 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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