Server-side expression parser denial of service

{
  "id": "2dd6fddc92678f8595b92a337094efac3e9f595ff1e7357c4d5673ed57003a08",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-88858",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Server-side expression parser denial of service",
    "summary": "A user with the Viewer role in Grafana can crash the server by submitting a crafted server-side math expression (uncontrolled recursion). A user with permission to provision alert rules can make the outage persist across restarts.",
    "evidence": "cve:CVE-2026-88858",
    "products": [
      {
        "name": {
          "value": "Grafana OSS",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      },
      {
        "name": {
          "value": "Grafana Enterprise",
          "evidence": "/containers/cna/affected/1/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-88858",
      "aliases": [
        "CVE-2026-88858"
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "version": "3.1",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
          }
        }
      ],
      "affected": [
        {
          "vendor": "Grafana",
          "product": "Grafana OSS",
          "versions": [
            {
              "status": "affected",
              "version": "7.4.0",
              "versionType": "semver",
              "lessThanOrEqual": "11.6.16"
            },
            {
              "status": "affected",
              "version": "12.0.0",
              "versionType": "semver",
              "lessThanOrEqual": "12.2.10"
            },
            {
              "status": "affected",
              "version": "12.3.0",
              "versionType": "semver",
              "lessThanOrEqual": "12.3.11"
            },
            {
              "status": "affected",
              "version": "12.4.0",
              "versionType": "semver",
              "lessThanOrEqual": "12.4.13"
            },
            {
              "status": "affected",
              "version": "13.0.0",
              "versionType": "semver",
              "lessThanOrEqual": "13.0.11"
            },
            {
              "status": "affected",
              "version": "13.1.0",
              "versionType": "semver",
              "lessThanOrEqual": "13.1.8"
            },
            {
              "status": "affected",
              "version": "13.2.0",
              "versionType": "semver",
              "lessThanOrEqual": "13.2.4"
            }
          ],
          "defaultStatus": "unaffected"
        },
        {
          "vendor": "Grafana",
          "product": "Grafana Enterprise",
          "versions": [
            {
              "status": "affected",
              "version": "7.4.0",
              "versionType": "semver",
              "lessThanOrEqual": "11.6.16"
            },
            {
              "status": "affected",
              "version": "12.0.0",
              "versionType": "semver",
              "lessThanOrEqual": "12.2.10"
            },
            {
              "status": "affected",
              "version": "12.3.0",
              "versionType": "semver",
              "lessThanOrEqual": "12.3.11"
            },
            {
              "status": "affected",
              "version": "12.4.0",
              "versionType": "semver",
              "lessThanOrEqual": "12.4.13"
            },
            {
              "status": "affected",
              "version": "13.0.0",
              "versionType": "semver",
              "lessThanOrEqual": "13.0.11"
            },
            {
              "status": "affected",
              "version": "13.1.0",
              "versionType": "semver",
              "lessThanOrEqual": "13.1.8"
            },
            {
              "status": "affected",
              "version": "13.2.0",
              "versionType": "semver",
              "lessThanOrEqual": "13.2.4"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ],
      "modified": "2026-10-28T16:50:17.291Z",
      "provider": "cve",
      "references": [
        "https://grafana.com/security/security-advisories/cve-2026-88858"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "57da9224-a3e2-4646-9d0e-c4dc2e05e7da",
          "shortName": "GRAFANA",
          "dateUpdated": "2026-10-28T16:50:17.291Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-88858",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 461130,
  "published_at": "2026-10-28T16:50:17.291+00:00"
}