Improper Neutralization of Formula Elements in a CSV File in EspoCRM - CVE-2026-55154

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Main Vulnerability Database Vulnerabilities #VU139912

Improper Neutralization of Formula Elements in a CSV File in EspoCRM - CVE-2026-55154

Published: July 28, 2026


Vulnerability identifier: #VU139912
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-55154
CWE-ID: CWE-1236
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: EspoCRM
Affected software:
EspoCRM

Detailed vulnerability description

The vulnerability allows a remote user to execute formula expressions in a spreadsheet application and disclose sensitive information.

The vulnerability exists due to improper neutralization of formula elements in a CSV file in the export processors when handling attacker-controlled field values containing leading whitespace or control characters before a formula trigger character. A remote user can supply a specially crafted field value and have it included in an exported CSV or XLSX file to execute formula expressions in a spreadsheet application and disclose sensitive information.

User interaction is required to open the exported file in a spreadsheet application, and command execution may be possible on legacy Excel configurations with DDE enabled.


How to mitigate CVE-2026-55154

Install security update from vendor's website.

Sources