{"id":"CVE-2026-55154","state":"PUBLISHED","title":"EspoCRM: CSV/Formula Injection sanitizer bypass via leading whitespace/control characters in export","description":"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.","publishedAt":"2026-10-15T14:49:15.584Z","updatedAt":"2026-10-16T17:13:56.910Z","severity":{"score":5.4,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["espocrm espocrm"],"affected":[{"vendor":"espocrm","product":"espocrm","versions":[{"version":"< 9.3.9","status":"affected"}]}],"references":["https://github.com/espocrm/espocrm/security/advisories/GHSA-xrwp-2gph-985x","https://github.com/espocrm/espocrm/commit/f209248efd0d63bc8f7906cb96c07020a758eead","https://github.com/espocrm/espocrm/releases/tag/9.3.9"],"weaknesses":["CWE-1236"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/55xxx/CVE-2026-55154.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55154","state":"PUBLISHED","datePublished":"2026-10-15T14:49:15.584Z","dateUpdated":"2026-10-16T17:13:56.910Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-16T15:13:28.165Z"},"containers":{"cna":{"title":"EspoCRM: CSV/Formula Injection sanitizer bypass via leading whitespace/control characters in export","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"espocrm","product":"espocrm","versions":[{"version":"< 9.3.9","status":"affected"}]}],"references":[{"url":"https://github.com/espocrm/espocrm/security/advisories/GHSA-xrwp-2gph-985x","name":"https://github.com/espocrm/espocrm/security/advisories/GHSA-xrwp-2gph-985x","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/espocrm/espocrm/commit/f209248efd0d63bc8f7906cb96c07020a758eead","name":"https://github.com/espocrm/espocrm/commit/f209248efd0d63bc8f7906cb96c07020a758eead","tags":["x_refsource_MISC"]},{"url":"https://github.com/espocrm/espocrm/releases/tag/9.3.9","name":"https://github.com/espocrm/espocrm/releases/tag/9.3.9","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1236","lang":"en","description":"CWE-1236: Improper Neutralization of Formula Elements in a CSV File","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-15T14:49:15.584Z"},"source":{"advisory":"GHSA-xrwp-2gph-985x","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-15T20:24:34.482538Z","id":"CVE-2026-55154","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-16T17:13:56.910Z"}}]}}}