{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "9.3.9"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "07653eb9be71f2663a2e2818647f2729433ebd34"
            }
          ],
          "repo": "https://github.com/espocrm/espocrm",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-xrwp-2gph-985x"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-1236"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55154.json"
  },
  "details": "EspoCRM is an open source customer relationship management application. Prior to 9.3.9, application/Espo/Tools/Export/Format/Csv/Processor.php, application/Espo/Tools/Export/Format/Xlsx/OpenSpoutProcessor.php, and application/Espo/Tools/Export/Format/Xlsx/PhpSpreadsheetProcessor.php inspect only the first byte in sanitizeCellValue(). An authenticated low-privileged user can store a free-text value whose formula trigger is preceded by whitespace or a control character, causing CSV or XLSX export to omit the leading single-quote formula-neutralization prefix. When a privileged user opens the exported file and accepts applicable spreadsheet security prompts, spreadsheet software can ignore the whitespace or control-character prefix and evaluate the cell as a formula, permitting outbound data disclosure and, on legacy configurations with DDE enabled, command execution. This issue is fixed in version 9.3.9.",
  "id": "CVE-2026-55154",
  "modified": "2026-10-16T02:30:55.987578596Z",
  "published": "2026-10-15T14:49:15.584Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55154.json"
    },
    {
      "type": "FIX",
      "url": "https://github.com/espocrm/espocrm/commit/f209248efd0d63bc8f7906cb96c07020a758eead"
    },
    {
      "type": "WEB",
      "url": "https://github.com/espocrm/espocrm/releases/tag/9.3.9"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/espocrm/espocrm/security/advisories/GHSA-xrwp-2gph-985x"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55154"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "EspoCRM: CSV/Formula Injection sanitizer bypass via leading whitespace/control characters in export"
}