FKIE_CVE-2026-21729

Vulnerability from fkie_nvd - Published: 2026-07-16 04:17 - Updated: 2026-07-16 04:17
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
Loki queries with large limits can cause large memory allocations which can impact the availability of the service, depending on its deployment strategy.
References
security@grafana.comhttps://grafana.com/security/security-advisories/cve-2026-21729
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "platforms": [
            "OnPrem",
            "Cloud"
          ],
          "product": "Loki",
          "vendor": "Grafana",
          "versions": [
            {
              "lessThan": "v3.7.0",
              "status": "affected",
              "version": "v3.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@grafana.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Loki queries with large limits can cause large memory allocations which can impact the availability of the service, depending on its deployment strategy."
    }
  ],
  "id": "CVE-2026-21729",
  "lastModified": "2026-07-16T04:17:29.260",
  "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"
      }
    ]
  },
  "published": "2026-07-16T04:17:29.260",
  "references": [
    {
      "source": "security@grafana.com",
      "url": "https://grafana.com/security/security-advisories/cve-2026-21729"
    }
  ],
  "sourceIdentifier": "security@grafana.com",
  "vulnStatus": "Received"
}



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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

Author Source Type Date Other

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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • 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.


Detection rules are retrieved from Rulezet.