Arti is our ongoing project to create a next-generation Tor implementation in
Rust. We’re happy to announce the latest release, Arti 2.5.0.
This release marks Counter Galois Onion as a stable feature and includes it in
full feature builds. Likewise, Congestion Control is now enabled in default
builds of Arti, increasing the overall speed without any further configuration.
Unfortunately, this release also comes with the disclosure of two medium-severity
DoS security issues, TROVE-2026-024 as well as TROVE-2026-027, whose fixes
are of course included within the release.
Additionally, this release continues our ongoing development towards using
Arti as a relay and as a directory authority.
Another noteworthy change is that we’ve increased our minimum supported Rust
version to Rust 1.91, released in October 2025.
Of course, this release also contains a number of bugfixes, cleanups, and
improvements throughout various parts of the code base.
For full details on what we’ve done, including API changes,
and for information about many more minor and less-visible changes,
please see the CHANGELOG.
For more information on using Arti, see our top-level README,
and the documentation for the arti binary.
Thanks to everybody who’s contributed to this release, including
5225225, Neel Chauhan, hjrgrn, moumenalaoui, pryty26.
Also, our deep thanks to our sponsors for funding the development of Arti!