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There's a new alpha release available for download. If you build Tor from source, you can download the source code for 0.3.5.2-alpha from the usual place on the website. Packages should be available over the coming weeks, with a new alpha Tor Browser release very soon.

Remember, this is an alpha release: you should only run this if you'd like to find and report more bugs than usual.

Tor 0.3.5.2-alpha fixes several bugs in 0.3.5.1-alpha, including one that made Tor think it had run out of sockets. Anybody running a relay or an onion service on 0.3.5.1-alpha should upgrade.

Changes in version 0.3.5.2-alpha - 2018-09-21

Major bugfixes (relay bandwidth statistics):
- When we close relayed circuits, report the data in the circuit queues as being written in our relay bandwidth stats. This mitigates guard discovery and other attacks that close circuits for the explicit purpose of noticing this discrepancy in statistics. Fixes bug 23512; bugfix on 0.0.8pre3.
Major bugfixes (socket accounting):
- In our socket accounting code, count a socket as closed even when it is closed indirectly by the TLS layer. Previously, we would count these sockets as still in use, and incorrectly believe that we had run out of sockets. Fixes bug 27795; bugfix on 0.3.5.1-alpha.

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New release: Tor 0.3.5.1-alpha

There's a new alpha release available for download. If you build Tor from source, you can download the source code for 0.3.5.1-alpha from the usual place on the website. Packages should be available over the coming weeks, with a new alpha Tor Browser release some time this week.

Remember, this is an alpha release: you should only run this if you'd like to find and report more bugs than usual.

Tor 0.3.5.1-alpha is the first release of the 0.3.5.x series. It adds client authorization for modern (v3) onion services, improves bootstrap reporting, begins reorganizing Tor's codebase, adds optional support for NSS in place of OpenSSL, and much more.

Changes in version 0.3.5.1-alpha - 2018-09-18

Major features (onion services, UI change):
- For a newly created onion service, the default version is now 3. Tor still supports existing version 2 services, but the operator now needs to set "HiddenServiceVersion 2" in order to create a new version 2 service. For existing services, Tor now learns the version by reading the key file. Closes ticket 27215.
Major features (relay, UI change):
- Relays no longer run as exits by default. If the "ExitRelay" option is auto (or unset), and no exit policy is specified with ExitPolicy or ReducedExitPolicy, we now treat ExitRelay as 0. Previously in this case, we allowed exit traffic and logged a warning message. Closes ticket 21530. Patch by Neel Chauhan.
- Tor now validates that the ContactInfo config option is valid UTF- 8 when parsing torrc. Closes ticket 27428.