The Open Source Security Foundation (OpenSSF) is proud to share that the Repository Service for The Update Framework (RSTUF) has completed a successful third-party security audit—marking a key milestone on its path to a stable 1.0.0 release.
The audit was conducted by X41 D-Sec GmbH and coordinated by the Open Source Technology Improvement Fund (OSTIF), with funding support from OpenSSF. It focused on the design, implementation, and deployment of the RSTUF services and tools.
Why This Matters to the Open Source Community:
Security is essential for trust in open source. Audits like this are one way we ensure the software our community depends on is hardened and resilient—not just in theory, but in practice. By investing in security at the project level, we strengthen the foundation for countless downstream users and contributors.
The audit identified a range of findings—none critical—and included recommendations to improve configurations, access controls, and deployment defaults. These are already being addressed by the RSTUF team, helping ensure stronger security out of the box for all users.
This Audit Reinforces Three Key Points for our Community:
- OpenSSF is investing in open source security.
This is one of many security audits we’ve funded to help projects mature securely and transparently. - Security audits are a best practice in project growth.
They provide a clear benchmark for readiness and responsible development. - Collaboration is key.
Through our partnership with OSTIF and the work of X41 and the RSTUF team, this audit was completed efficiently and with open communication throughout.
Independent assessments like this one play a vital role in improving the security posture of the open source ecosystem. We’re proud to support projects like RSTUF in building trust and transparency through every stage of development.
Want to get involved?
If you’re interested in contributing to RSTUF or following its continued progress:
- Â Check out the RSTUF GitHub organization
- Â Explore the RSTUF documentation and community
- Join the conversation via the OpenSSF Security Tooling Working Group if your focus is to provide the best security tools for open source developers and make them universally accessible.
“I’m very pleased with the outcome of the audit and what it represents for the project. It validates some of the tough but smart decisions the RSTUF community has made along the way, and it highlights the dedication of everyone who’s contributed. A big thank you to all contributors and supporters! This was truly a team effort—with excellent work from X41 and incredible support from OSTIF, who helped streamline the process and reduce the burden on us as mostly volunteer open source maintainers. I hope this milestone drives more adoption and continued growth for RSTUF.”Â
 – Kairo de Araujo, Author and core maintainer
“The results of this engagement illustrate how a recommended practice like security audits, when championed by an independent body like OSTIF, are an extremely effective tool for improving security posture and helping open source projects grow and mature. A big thank you to everyone involved in the collaboration and to OpenSSF for funding this engagement.”
– Amir Montazery, Managing Director