CVE-2026-64955: Velociraptor CSV Formula Injection in Export Pipeline

Published on 2026-07-31 Vulnogram
CVSS · MEDIUM · 6.1 ⁄10 · CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N
Scoring scenario: GENERAL
attackVector: NETWORK
attackComplexity: HIGH
privilegesRequired: NONE
userInteraction: REQUIRED
scope: CHANGED
confidentialityImpact: HIGH
integrityImpact: NONE
availabilityImpact: NONE
Description

When Microsoft Excel imports a CSV file, it executes cells beginning with certain characters as formulas, giving such CSV files arbitrary execution. 

Velociraptor fails to sanitize such cells when exporting to CSV from various places such as the GUI, offline collector or data exports.
It is not clear if the vulnerability is actually in Microsoft Excel treating a CSV data file as executable content, or if Velociraptor should be sanitizing the data to prevent Excel from executing it. However, since this is such a common use case for Velociraptor we decided to highlight it in an advisory.

Problem CWE-1236 Improper neutralization of formula elements in a CSV file
Required configuration for exposure This is only an issue if the exported CSV files are subsequently opened in Microsoft Excel.
Workarounds Never open exported CSV files using Microsoft Excel or Google Docs. Libreoffice was tested to not be vulnerable to this issue so it can be used safely.
ProductAffected
Rapid7 Velociraptor on Windows, MacOS
source repo
Default status is unaffected 		before 0.77.2
Credits
  • Tristan Madani (Talence Security)
    •
References