Salesforce Winter 27 Release, Dates and What Changes

Release notes went live on August 19, sandbox preview opened August 28, and the first production wave lands the weekend of September 4.

Salesforce's Winter '27 release notes published August 19, 2026, sandbox preview opened August 28, and production upgrades roll out across three weekends — September 4, October 2, and October 9, assigned by instance. The most useful thing an admin can do this week is find their own org's exact date, since two changes in this release can quietly break something before anyone notices.

Five dates, one permission change, one deadline that moved to February 2027.

The permission change worth flagging to your team

Enable Profile Filtering enforces this cycle. Users without the View All Profiles permission can now see only their own profile name. If any Apex or Flow logic queries the Profile of a user other than the one running it, that query now returns empty for anyone without the permission.

Worth checking before the upgrade weekend, not after a report or an automation quietly stops working and nobody can figure out why.

The API login change that got a reprieve

Here's a correction worth knowing before it spreads further. The retirement of the OAuth 2.0 username-password flow — the one where an integration logs in with a username, password, and security token — was originally scheduled to enforce in Winter '27. Salesforce postponed the enforcement date to February 20, 2027.

Treat that as delayed, not cancelled. Any integration still authenticating that way will stop getting a token on the later date, and finding every affected integration takes real time, so the extra months are worth spending now rather than in January. Check Login History filtered for OAuth password logins, and review Connected Apps OAuth Usage in Setup, to see what's actually exposed in your org.

What's actually new to use this cycle

🧩

Flow Builder — grouped sections, edit history, beta Test Mode

Collapsible grouped sections with their own labels, an edit history timeline that shows every save and lets you restore older versions, and a new beta Flow Test Mode that splits Build and Test inside the builder with code coverage and mock outputs.

🤖

Agentforce — beta Custom Scorers, Hosted MCP Servers

Lets a team define its own pass or fail evaluation logic for an agent session instead of relying only on Salesforce's built-in quality metrics, plus expanded interoperability through Hosted MCP Servers.

🌐

Experience Cloud — LWR sites embed real Lightning reports

Closes a long-standing gap: LWR sites can now embed an actual Lightning report, with charts, tables, and record editing, without falling back to the older Aura framework to get it.

Find your exact upgrade weekend

Production dates are assigned per instance, not per org type or edition. Check Salesforce Trust, search by instance name or domain, and open the Maintenance tab to see the exact weekend for that specific org.

Writer note

Dates above reflect Salesforce's published Winter '27 schedule and Trust status as of late August 2026. Production weekends are assigned per instance, so confirm the exact date on Salesforce Trust before publishing or promising a client a timeline.

Two changes in this release can quietly break something before anyone notices. Finding your org's exact date is the highest-leverage five minutes an admin can spend this week.

Book a pre-upgrade Health Check through our contact form to catch breaking integrations before your org's wave hits, and follow TrueSolv on LinkedIn for release coverage like this.

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