{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:external-secrets:external_secrets_operator:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.3.0"
              }
            ],
            "source": [
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1f9683fa65eb92e27f8a0adab2e483ff305fc1e9"
            },
            {
              "fixed": "6800989bdc12782ca2605d3b8bf7f2876a16551a"
            }
          ],
          "repo": "https://github.com/external-secrets/external-secrets",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-r2pg-r6h7-crf3"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-200"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34984.json"
  },
  "details": "External Secrets Operator reads information from a third-party service and automatically injects the values as Kubernetes Secrets. Versions 2.2.0 and below contain a vulnerability in runtime/template/v2/template.go where the v2 template engine removes env and expandenv from Sprig's TxtFuncMap() but leaves the getHostByName function accessible to user-controlled templates. Since ESO executes templates within the controller process, an attacker who can create or update templated ExternalSecret resources can invoke controller-side DNS lookups using secret-derived values. This creates a DNS exfiltration primitive, allowing fetched secret material to be leaked via DNS queries without requiring direct outbound network access from the attacker's workload. The impact is a confidentiality issue, particularly in environments where untrusted or lower-trust users can author templated ExternalSecret resources and the controller has DNS resolution capability. This issue has been fixed in version 2.3.0.",
  "id": "CVE-2026-34984",
  "modified": "2026-07-08T05:38:15.660618383Z",
  "published": "2026-04-14T01:48:41.166Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/external-secrets/external-secrets/releases/tag/v2.3.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34984.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/external-secrets/external-secrets/security/advisories/GHSA-r2pg-r6h7-crf3"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34984"
    },
    {
      "type": "FIX",
      "url": "https://github.com/external-secrets/external-secrets/commit/6800989bdc12782ca2605d3b8bf7f2876a16551a"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "External Secrets Operator has DNS exfiltration via getHostByName in its v2 template engine"
}