# 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.

- **Severity:** Medium 6.1 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N`)
- **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 available:** No
- **Published:** 12 Aug 2026
- **Updated:** 12 Aug 2026
- **Also known as:** GHSA-x3cx-8mg8-hcv2

## 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 (Improper Neutralization of Formula Elements in a CSV File)

## 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.

## Is CVE-2026-64955 being exploited?

There is no known exploitation of CVE-2026-64955 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-64955 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-64955 in the wild and no public exploit code.

Affected product: Rapid7 Velociraptor. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-64955/ (Markdown: https://insights.sbomify.com/CVE-2026-64955/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-64955
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-64955
- OSV: https://osv.dev/vulnerability/CVE-2026-64955

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-64955/
Summaries are generated and may contain mistakes; the official description above is the record.