A Security Warning for the R Community: Why Rao RStudio is an Unacceptable Risk

General
1

There’s a reason we do not see RStudio forks exist. AI integration is great, but this is pure risk and a dumb move from any RStudio user who installs this.

TL;DR: This post breaks down why using the a forked RStudio is a serious security risk. It’s not a sanctioned community project like VSCodium, it lacks the professional security resources of Posit, and the immense, hidden technical burden of maintaining it makes it a ticking time bomb for bugs, data corruption, and malware. Don’t risk your data or your career on it.

As data professionals, the integrity of our tools is non-negotiable. This unofficial fork of RStudio has been circulating, and while the promise of new features may be tempting, a closer look reveals a project that represents a significant and unjustifiable security risk to the entire R community. This isn’t about gatekeeping innovation; it’s about upholding minimum professional standards for software security.

The most common defense of a project like this is, “It’s open-source, so anyone can audit the code for malware.” This is a theoretical fantasy that is practically useless. RStudio is a massive application with millions of lines of code written in C++, Java, and JavaScript/TypeScript, with complex dependencies like Qt and its embedded WebEngine. The reality is that almost no one has the time or the highly specialized, cross-disciplinary expertise required to perform a meaningful security audit. Trusting that “someone” in the community will catch a malicious commit is an abdication of responsibility. In today’s security landscape, a software supply chain attack can be inherited from any one of its dozens of unmonitored dependencies. Using this software means you are implicitly trusting every line of code without any professional verification.

It’s also tempting to compare this to trusted community builds like VSCodium, but that comparison is dangerously flawed. Microsoft intentionally maintains the Code - OSS repository as a de-branded, telemetry-free core for the community to build upon. This creates a sanctioned, transparent ecosystem. RStudio has no such model. Posit’s entire business reputation hinges on the security and stability of their software. To meet this obligation, they employ a large, dedicated security team and push critical patches on a near-monthly cycle. The expectation that a two-person team can match this rigor is absurd. When—not if—a vulnerability is discovered, there is no professional team on standby and zero accountability.

Finally, this ignores the unseen iceberg: the massive operational burden of maintaining professional-grade software. This includes managing complex cross-platform builds, securing and maintaining expensive code-signing certificates, and constantly triaging vulnerabilities in all upstream dependencies. There is no public evidence that its creators here have the resources or expertise and background to handle this. Your work, your data’s integrity, and your system’s security are too important to gamble on a project that fails to meet these fundamental requirements. Stick to the official, accountable releases from Posit.

3

Hi,

We’ll leave this post up in the interest of transparency, but we would appreciate you not leaving future anonymous, inflammatory attacks without citing specific concerns or first asking us whether the concerns are already addressed. As the community grows, we would prefer that forum posts address specific topics that can improve the software. Any reasonable person would understand that this is an early-stage start-up adhering to the best security practices feasible while focusing on dramatically improving the experience and speed of doing data science.

  1. Our security information is available https://www.lotas.ai/security and is regularly updated. In particular, we retain no data, and we have zero data retention policies with OpenAI and Anthropic that guarantee they will not retain data either. The only exception is that we use user analytics data when users turn off secure mode. Furthermore, we have code signed our Mac binaries for 2 months now, and we will begin code signing our Windows releases within 2 weeks now that we are seeing enough traffic to justify the cost.
  2. Rao is a fork of RStudio that we keep updated with the latest RStudio distributions. Security patches to RStudio will be incorporated into Rao, and the only component of Rao not currently in RStudio is the AI integration and the ripgrep installation. We have included minimal new dependencies to achieve these features, so the Rao codebase almost entirely inherits the security of the RStudio codebase.
  3. Indeed Posit’s business reputation hinges on the security and stability of their software, and Rao is not their software and therefore should not bear on their reputation except insofar as RStudio and Rao are derived from the same dependencies and historical code base. We have intentionally removed the hundreds of instances of RStudio and Posit branding from Rao in order to avoid confusion, and we would be happy to fix any instances we have missed.
  4. We would like to reiterate that this post cited no specific security concerns, only fearmongering phrases designed to erode trust. If the OP is aware of security concerns, he/she should tell us at founders@lotas.ai and we will address them immediately if deemed relevant.

Will

4

Hi Will,

I appreciate your response, but I want to be clear that my post was not fearmongering. It was a serious warning based on the real and well-understood risks of forking complex software like RStudio and distributing modified binaries without a professional security apparatus in place. This isn’t about discouraging progress or shutting down innovation. It’s about ensuring that anyone using a tool like this understands the actual risks they are assuming.

The issue is not just about zero data retention with AI services. That’s a narrow slice of a much broader security landscape. The real concern is that Rao is a fork of RStudio—a massive, multi-language codebase with layers of system-level dependencies, from C++ and Qt to embedded browsers and JavaScript engines. Modifying and redistributing that kind of tool comes with enormous surface area for vulnerabilities. Security is not inherited by default. The moment you fork and modify, you own the full risk of everything you change and everything you keep. That includes handling the upstream patching cadence, managing dependency risks, and verifying the integrity of all integrated components.

You say Rao follows “the best security practices feasible.” But that is not the same as following practices that are appropriate for the risk profile of a tool like this. When something ships as a binary with write-level access to a user’s file system, interacts with APIs, and can execute code, “feasible” is not enough. It needs to be rigorous, systematic, and transparent. I see no detailed security documentation that accounts for the risks specific to maintaining a fork. No public threat model, no formal review processes, no plan for dependency vulnerability monitoring, no assurance about how builds are verified and distributed.

There is also no guidance for users who may be integrating Rao into regulated or security-sensitive environments. That is a red flag. Until the project publishes more than a generic zero-data-retention statement and starts providing concrete security documentation that speaks to the realities of maintaining a high-risk codebase, it is entirely fair and reasonable to caution others against installing or trusting it.

This is not about fear. It’s about the level of diligence that tools like this demand.

I’d be happy to discuss more.

5

Hi,

We hear and acknowledge all of your concerns. We understand that maintaining a secure fork of RStudio involves more than addressing data retention or API-level security.

I’d like to reiterate that our commitment to security and privacy is sincere. Our current measures will evolve significantly to meet industry-grade standards appropriate for this risk profile. This will require considerable effort and time, but we will work as fast as possible, and we will share our progress with the Lotas community along the way.

We firmly believe in Rao’s potential to benefit millions of RStudio users, so we will keep building. Rest assured that security and privacy will always remain our top priorities.

Jorge

6

Sincerity is not enough when it comes to security. No one who cares about safety or responsible software use should be using this project until the necessary protections are actually in place.

You acknowledge the concerns, but without real, implemented security measures, this remains an active risk. Promises and roadmaps do not substitute for verified protections. Until those exist, this should not be considered safe or usable in any environment where privacy and security matter.

Also, stop advertising this as “Cursor for RStudio”. It is not. Continuing to represent it as Rstudio is misleading and unacceptable. Legal action should be considered, because presenting this project as RStudio misleads users and damages trust in the original software and its community.

7

I think the tool is helpful and I know researchers who will find this helpful. These guys will figure it out and YC saw something in them so I will trust them. If you can’t recognize how something like this can be helpful then you are being disingenuous and malicious.

If you actually cared about what you were talking about:

  • You would help them try to achieve it or address certain concerns
  • You would be more constructive
  • You would email them directly

Note to the Lotas team:
Keep up the good work guys, I am very excited for you all. Ignore shit like this, make data science more approachable for all. We non-technical premeds appreciate you.

PS:
To the anonymous author of this, I hope I receive an AI-generated response to this.