CVE-2026-64955 Velociraptor CSV Formula Injection in Export Pipeline
Attackers can execute arbitrary code via CSV formula injection in Velociraptor exports when opened in Excel.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-64955?
CVE-2026-64955 is a medium-severity code injection vulnerability in Rapid7 Velociraptor, published on 12 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-1236
Which versions are affected by CVE-2026-64955?
How do I fix CVE-2026-64955?
No fix has been published for CVE-2026-64955 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-64955 being exploited?
There is no known exploitation of CVE-2026-64955 in the wild and no public exploit code.
Sources
Also known as GHSA-x3cx-8mg8-hcv2.