Stack Watch
Self-hosted update briefs — is it safe to update, or wait?
Disclaimer: Automated heuristics over public release notes and vulnerability databases (OSV / NVD). Can be wrong or incomplete. Always back up first and validate upgrades yourself. Stack Watch does not invent CVE IDs or issue counts. This is an MVP research project, not a live paid service.
Home / Syncthing / v2.1.7-rc.2

Syncthing v2.1.7-rc.2

WAIT

Marked as a pre-release on GitHub; wait for a stable tag unless you intend to test.

Published: 2026-10-13T07:31:50Z · GitHub release

Summary of changes

## 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/ - …

Breaking changes

None detected by heuristics.

CVEs linked to this release

None linked from release notes or OSV fixed-in match.

Linked issues / PRs mentioned

6

Back up first

Always back up first. Stack Watch briefs are automated heuristics over public release notes and vulnerability databases. They can be wrong or incomplete. You are responsible for validating upgrades in your own environment. We never invent CVE IDs or issue counts — if a number is missing, it was not found.