CVE-2026-111038 in Total Spend Management Platform
Summary
by MITRE • 11/04/2026
CSV formula injection vulnerability in the export functionality of the Coupa Supplier Portal SaaS platform. The vulnerability arises because certain user-controlled data, such as event names or templates within the Tenders module, are not properly validated or sanitised before being included in CSV files generated by the application. An attacker with low privileges can input specially crafted values that begin with characters interpreted as formulas by spreadsheet applications. When a victim downloads and opens the generated file in a compatible client, the content may be interpreted as a formula, potentially leading to unauthorised actions such as the execution of commands via mechanisms such as DDE, access to information, or interaction with system resources under the victim’s context.
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Analysis
by VulDB Data Team • 11/04/2026
The Coupa Supplier Portal SaaS platform contains a critical CSV formula injection vulnerability within its export functionality, specifically affecting data generated from modules such as Tenders where user-controlled inputs like event names and templates are processed. This security flaw stems from an insufficient validation and sanitization mechanism that fails to neutralize special characters when exporting data into comma-separated values format. In standard spreadsheet applications, certain prefixes such as equals signs, plus signs, minus signs, or tabs trigger the interpretation of cell content as executable formulas rather than static text. Because the application does not escape these leading characters or enforce strict string formatting before inclusion in the CSV file, any maliciously crafted input provided by a user is preserved exactly as entered within the exported data structure.
An attacker with low-privileged access to the Coupa platform can exploit this weakness by injecting specially crafted strings into fields that are subsequently included in exportable reports. By entering values that begin with formula-inducing characters, such as =cmd|' /C calc'!A1 or similar DDE (Dynamic Data Exchange) payloads, the attacker ensures that these sequences appear directly within the CSV output. When a victim user, who typically has higher privileges or different access contexts, downloads and opens this file in a compatible spreadsheet client like Microsoft Excel or LibreOffice Calc, the application parses the leading characters as instructions for formula execution rather than literal text content. This behavior bypasses standard security expectations where data is treated purely as information to be displayed.
The operational impact of this vulnerability extends beyond simple data corruption, potentially enabling unauthorized actions under the context of the victim user. If the spreadsheet client supports Dynamic Data Exchange or similar legacy features that remain enabled by default in many enterprise environments, the injected formula can trigger external process execution on the victim's machine. This could result in remote code execution, allowing an attacker to run arbitrary commands with the privileges of the person opening the file. Even if direct command execution is mitigated through application settings, the vulnerability still poses significant risks including unauthorized information disclosure and interaction with system resources. The attack vector relies heavily on social engineering or targeted distribution, as it requires a specific user action to download and open the maliciously crafted CSV file in an affected client environment.
From a classification perspective, this issue aligns with CWE-94 Improper Control of Generation of Code ('Code Injection') specifically manifesting as formula injection within data files. It also maps to MITRE ATT&CK techniques related to Command and Scripting Interpreter abuse, particularly those involving DDE or macro execution via document manipulation. To mitigate this risk, Coupa should implement strict input sanitization that escapes all special characters at the beginning of fields during CSV generation. Additionally, enforcing UTF-8 encoding with explicit quoting for all text fields can prevent interpretation as formulas by most modern spreadsheet parsers. Users and administrators are advised to configure their spreadsheet applications to disable DDE auto-execution features and to exercise caution when opening files from untrusted sources until a patch is deployed that addresses the lack of proper data validation in the export module.