{
  "crds_version": "0.1",
  "kind": "base",
  "id": "crds:cve-2026-20253",
  "revision": 1,
  "title": "Splunk Enterprise — unauthenticated file write via database sidecar",
  "summary": "A PostgreSQL sidecar endpoint in Splunk Enterprise 10.x takes file operations from anyone who can reach it, with no sign-in required, so an attacker can create or blank out arbitrary files on the server — a route to code execution.",
  "source_type": "cve",
  "severity": "critical",
  "cvss": {
    "score": 9.8,
    "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "version": "3.1"
  },
  "epss": 0.96939,
  "exploitation": {
    "known_exploited": true,
    "exploit_available": true,
    "attack_complexity": "low",
    "kev_added": "2026-06-18",
    "prerequisites": "Network reach to the PostgreSQL sidecar endpoint on a Splunk Enterprise 10.x host; no credentials needed."
  },
  "remediation": {
    "patch_available": true,
    "workaround_available": true,
    "fixed_in": [
      "Splunk Enterprise 10.2.4",
      "Splunk Enterprise 10.0.7"
    ]
  },
  "mitre_attack": [
    "T1190"
  ],
  "kill_chain": "initial_access",
  "recommended_action": "Upgrade Splunk Enterprise to 10.2.4 or 10.0.7 now; where you cannot, shut down the PostgreSQL sidecar service and keep the endpoint off routable networks.",
  "confidence": "high",
  "provenance": [
    {
      "fields": [
        "cvss",
        "exploitation.attack_complexity",
        "exploitation.exploit_available",
        "references",
        "published_at"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2026-20253",
      "retrieved_at": "2026-09-23T07:33:20.707Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "exploitation.known_exploited",
        "exploitation.kev_added"
      ],
      "source": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "retrieved_at": "2026-09-23T07:33:20.707Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "epss"
      ],
      "source": "https://api.first.org/data/v1/epss?cve=CVE-2026-20253",
      "retrieved_at": "2026-09-23T07:33:20.707Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "title",
        "summary",
        "severity",
        "remediation",
        "mitre_attack",
        "kill_chain",
        "recommended_action",
        "confidence",
        "tags",
        "exploitation.prerequisites"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2026-20253",
      "retrieved_at": "2026-09-23T07:33:20.707Z",
      "confidence": "high",
      "extractor": "claude-code"
    }
  ],
  "references": [
    {
      "type": "cve",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-20253",
      "label": "NVD record"
    },
    {
      "type": "cisa",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "label": "CISA Known Exploited Vulnerabilities catalog"
    },
    {
      "type": "vendor_advisory",
      "url": "https://advisory.splunk.com/advisories/SVD-2026-0603"
    },
    {
      "type": "exploit",
      "url": "https://labs.watchtowr.com/why-use-app-level-auth-when-every-database-has-auth-splunk-enterprise-cve-2026-20253-pre-auth-rce/"
    }
  ],
  "published_at": "2026-06-10T18:16:40.760Z",
  "issued_at": "2026-09-23T07:33:20.707Z",
  "tags": [
    "splunk",
    "missing-authentication",
    "remote-code-execution",
    "kev"
  ]
}