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Release Tue, Jun 2, 2026 2 min read

Syncthing 2.1.1

Original release notes

Major changes in 2.1

  • Devices and folders can now be grouped in the GUI by setting the new

group attribute.

  • HTTP and HTTPS proxies with support for CONNECT can now be used, in

addition to the existing support for SOCKS proxies (the environment variable all_proxy=https://...).

  • Block indexing can be turned off for folders where it's more desirable to

optimise for reduced database size and overhead than minimal transfer size (the blockIndexing attribute on folder configuration).

  • GUI login session duration can be configured to be longer or shorter than

the default one week, or set to infinitely long. The cookie path can also be adjusted. (The sessionCookieDurationS and sessionCookiePath attributes in the GUI configuration.)

This release is also available as:

  • APT repository: https://apt.syncthing.net/
  • Docker image: docker.io/syncthing/syncthing:2.1.1 or ghcr.io/syncthing/syncthing:2.1.1

({docker,ghcr}.io/syncthing/syncthing:2 to follow just the major version)

What's Changed

Fixes

  • fix(syncthing): properly upgrade via REST when Syncthing is running (fixes #10697) by @calmh in https://github.com/syncthing/syncthing/pull/10699
  • fix(versioner): ensure user read/write/execute on archived dirs (fixes #10532) by @calmh in https://github.com/syncthing/syncthing/pull/10696
  • fix(discover): only announce wildcard for TCP punching when listening on wildcard address (fixes #10503) by @calmh in https://github.com/syncthing/syncthing/pull/10691
  • fix(stcrashreceiver): close source loader responses on errors by @mattn in https://github.com/syncthing/syncthing/pull/10704
  • fix(protocol): handle zero-size requests (fixes #10709) by @calmh in https://github.com/syncthing/syncthing/pull/10710

Other

  • build: be explicit about workflow permissions by @calmh in https://github.com/syncthing/syncthing/pull/10690
  • chore(syncthing): include runtime context in GC crashes by @calmh in https://github.com/syncthing/syncthing/pull/10702
  • build(deps): x/net for govulncheck by @calmh in https://github.com/syncthing/syncthing/pull/10703
  • chore: use path/filepath for local file system paths by @mattn in https://github.com/syncthing/syncthing/pull/10705

New Contributors

  • @mattn made their first contribution in https://github.com/syncthing/syncthing/pull/10704

Full Changelog: https://github.com/syncthing/syncthing/compare/v2.1.0...v2.1.1