Changelog

Secure token storage

Unleash now stores API tokens securely by default. Every backend, frontend, personal access, and service account token you create in v8.3 or later is a secure token: Unleash stores a selector and a verifier in its database instead of the complete token, so the token can't be recovered from the database or its backups. You can recognize a secure token by the v2_ prefix in its secret.

Because Unleash never stores the complete token, it shows the token only once, when you create it. Copy it immediately and store it in a secrets manager. If you lose a secure token, rotate it.

Tokens created in v8.2 or earlier are legacy tokens and keep working after you upgrade. To replace them with secure tokens, rotate each legacy token, including tokens created from the INIT_*_API_TOKENS environment variables. If you use Unleash Edge, upgrade to Edge v20.5.0 or later for improved token telemetry.

For self-hosted v8.2 instances, you can opt in before upgrading. Set the environment variables for the token types you use and restart Unleash:

These settings affect newly generated tokens only. From v8.3, secure storage is the default and these environment variables are not required.

Simplified Add strategy dialog

The Add strategy dialog now presents three options instead of a list of every strategy type, so you can pick the right one without comparing similar choices:

• Use project default applies the default strategy your team has defined for the environment in this project.
• Set up manually opens the gradual rollout form, where you choose the rollout percentage, targeting, and variants.
• Start from a template applies a release template with a predefined sequence of milestones. [Enterprise]

The IPs and Hosts advanced strategies and your custom strategies are available under More strategies. See Strategy types.

Delete tags

You can now delete a tag that you no longer need. Go to Configure > Tag types, select the tag type, and click Delete next to the tag value. The list shows how many flags use each value. Deleting a tag removes it from every feature flag that uses it, while the tag type and its other values stay in place. You can also delete tags with the delete tag endpoint.

Flag links moved into Flag details

External links now live in a Resources section at the bottom of the Flag details panel on the flag's Overview page, instead of in a separate box. Click Add link in that section to add a link. Everything else about links works as before.

Feedback reports from the MCP server

The Unleash MCP server can now send anonymous diagnostic reports to Unleash when a tool call fails, returns an unexpected result, or you ask for something the server can't do yet. Unleash uses these reports to prioritize fixes and new tools. Reports never include flag names, project IDs, code, raw error messages, or tokens.

Regex, IP address, and SemVer constraint operators

New constraint operators give you more precise targeting in activation strategies and segments. The regex and IP address operators are available in beta.

The regex operator matches a context field against a regular expression in RE2 syntax, so you can target patterns such as ID formats, email domains, or application names that the other string operators can't express. You can test sample values against your expression in the Admin UI before you save.

The IP address operator checks whether a context field, typically remoteAddress, falls within a list of IP addresses or CIDR ranges. Both IPv4 and IPv6 are supported.

The SemVer operators now include SEMVER_GTE and SEMVER_LTE, so you can target versions greater than or equal to, or less than or equal to, a given version with a single constraint.

All three operators require an SDK version that supports them. See SDK compatibility for the minimum version per SDK.

[8.3.0] - 2026-10-27

Bug Fixes

• Hide SSO options on the invitation screen (#12622)

• Make client registration writes resilient to deadlocks (#12619)

• Show more honest graphs / align time series

• Avoid cleaning the negative cache

• Harden the signup endpoint

• Help announcement colors

• Count every environment toggle attempt, not just confirmed dialogs

• Apply the OSS default-project rule in project read model

• Clean up v2 token clients

• Apply the OSS default-project rule to personal dashboard flags

• New strategies flow - apply ui feedback

• Reject duplicate strategy parameter names (#12632)

• Cross-project IDOR in feature links (GHSA-65r2-v52f-778r)

• SSRF guard bypass via IPv6 transition addresses

• ReDoS via feature-naming regex

• Race condition in password-reset/invite token allows single-use bypass and silent password overwrite

• Clear announcer timeouts

• Small playground ui issues

• Reflected XSS in admin email-preview endpoint (GHSA-5c47-jgc3-3gm4)

• Flag env name typo

• Update regex SDK requirements

• Playground sidebar minor fixes

• Evaluate "parent must be off" dependencies like the SDK

• Update dependency ip-address to v10.5.1 [security] (#12686)

• Keep line breaks in string variant payloads

• Update dependency ip-address to v10.7.1 [security] (#12694)

• Feature lifecycle project belonging check

• Remove duplicated description

• Strategy env check

• Segment strategy project and env check

• Update dependency ip-address to v10.7.2 (#12702)

• Update dependency @fern-api/search-widget to v0.5.6 (#12701)

• Return sensitive fields as masked on update/create

• Show the safeguard trigger window on closed change requests

• Drain scheduled jobs before database shutdown

• Use Dockerfile Node version by default in Bake (#12713)

• CSP rules can't depend on the dynamic flag

• Require frontend E2E success in PR build gate (#12715)

• Remove usage of node:util in the frontend app

• Force OIDC re-auth behind sessionTimeouts (EG-4756)

• Hydrate streaming state and revision from one database snapshot

• Don't force ChangeRequestTable width to avoid breaking layout on smaller breakpoints

• Adjust CreateProjectDialog modal sidebar height regardless of content scroll

• Disable keyboard shortcut when its triggers are hidden, resolve modifiers exactly

• Flag name placeholder shows the project's naming example

• Document the empty response of the environment toggle endpoints

• Add endSession() and call it from six different modules

• Tell a missing session start from an unreadable one

• Incorrect bulk-tag assignment

• Silent errors on assigning single-emoji tag

• Reviewer button layout

• Stop useLocalStorageState from writing outdated values on re-render

• Don't render an empty div if there is no limit warning

• Compare users.updated_at at ms precision in user sync

• Say when a logout was the session's timeout

• Start recurring interval after the initial jitter

• Clean up never-seen system API tokens

• Reduce the focus outline on Radio, Checkbox and Switch controls

• Initialize revision baseline alongside frontend cache warming

• Exclude potentially-stale and lifecycle events from configuration revisions

• Share token validation caches with Edge

• Remove RecentlyUsedSegments from new Strategy form

• Disable Modal focus trap when Unleash Toolbar is enabled

• Compact dialog header and truncate long project names

• Make chip text selectable on constraint editor

• Enforce hard max-age regardless of the sessionTimeouts flag

• Use UTC dates for the default event log range (#12731)

• Write flag events when an environment is removed from a project

• [breaking] Remove administrative metadata from Client API configuration

• Skip existing links and roll back failed startup environment overrides

• Only compare strategies for the stale data dialog

• Add max height and dismiss button to the stale data dialog

• Await segment insertion instead of fire and forget

• Wrong tooltip title for link actions

• Api token list permission checks

• Does no longer keep MarkCompletedDialogue state between flags

• Use author's name in Change Request description

• Bump Node to 24.22.1 / 22.23.4 to distrust compromised eMudhra CAs

• Fail add and update changes that can't apply

• Keep shared delta cursor when hydrating another environment

• Build SelectPopover keyboard handling on top of MUI's combobox

• Fail v2 token expiry update and delete when the transaction rolls back

• Set default idle timeout to 15 minutes

• Extract the user id using the helper

• Save variants and their events in one transaction

• Remove discrepancies between Chips in Strategy form

• Stop prototype pollution by not accepting JS reserved property names

Documentation

• Record how to track user journeys

• Update CHANGELOG.md

Features

• Simpler strategy setup - part 4 - more strategies dropdown menu

• Allow uxtweak survey submissions through the CSP

• Track API token and environment journeys

• Moves Addon project filter from frontend to backend

• Show current exposures count indicator next to automation

• Adds user-agent to audit events for user-initiated events only - EG-4693

• Displays all project scoped integrations and makes UI similar to global Integrations page

• Hash email in flight recorder not unleash

• Batch same user expiry tokens in one email

• Simpler strategy setup - part 5c - template card and template screen

• Simpler strategy setup - part 8 - icons from the design

• Add highlight help

• Let Dialogue own the confirm journey via onConfirm

• Track strategy delete and enable/disable

• Show api token exact last seen time

• Added rate limiting for Admin API

• Add UPDATE_PROJECT_ADDON project permission

• Track project actions journeys

• Track project flags list navigation

• Track change request journeys

• Track favorites across all surfaces

• Mark-completed lifecycle journey

• Track event log gestures

• Track header actions and exports

• Readies addon service layer for project addon route

• Add display type scale + apply to large content numbers

• Page headers use the new h1/h2 scale

• Move /api/admin/flag-creators to beta

• Simpler strategy setup - part 6 - tracking

• Support whitespaces in playground multi values

• Adds project scoped addon endpoints/controller

• Track personal dashboard section toggles

• Modifies UI to let project owner modify project integrations

• IN_CIDR operator support

• Add a flag for IP constraints

• Ingest context enricher metrics

• Add the IN_CIDR operator to the constraint editor

• Show SDK version warning for IN_CIDR operator

• Hashed email targeting

• Add playground to sidebar on flag page

• Playground ip operator

• Show the target IP range for CIDR values

• Disable legal values which fail validation

• Unleash Intro

• Onboarding checkist to help the first admin

• Add lifetime_days column to features

• Add tagManagementViaUi feature flag

• Read and write lifetime_days on feature toggle store

• Update features_view to include feature lifetime_days

• Label the ToggleCard switch with its title

• Update feature Joi schema to include lifetime

• Implement usage and counts for the tag types API

• Show user-defined key-value pairs in integration form

• Add feedback opt-in toggle to the admin page

• Read and persist feedbackOptIn via the settings API

• Give flag own lifetime precedence for potentially stale computation

• Allow end users to send objects as parameter values to integration API

• Update snow addon to allow it to accept and process kvps.

• Prepare query for the upcoming tag values usage API

• Add remoteMcpFeedback flag gating the feedback opt-in

• Add GET /api/admin/tag-types/:name/values endpoint

• Tag rename API

• Render tag values

• Add optional idle timeout settings, behind a flag - EG-4704

• Creates initial bare-bones setup of GitHub Integration

• Add browser and viewport width to flight recorder events

• StartSession() creates every logged-in session - EG-4707

• Enforce session max-age and idle timeout server-side - EG-4705 EG-4706

• Enable remote mcp feedback by default

• Tag types usage

• Move tag type form buttons above the values table

• Add viewport height to flight recorder events

• Report the session deadline internally - EG-4709

• Add the keep-alive endpoint - EG-4709

• Report user activity from the admin UI - EG-4709

• Left-align the hide/show environments button

• Delete tag values from the UI

• Add support for array and object-array parameter types

• Rename tag values from the UI

• Feature overview description expand/collapse

• Feature overview: merge Links into Details

• Gh-integration frontend mapping of appname to repos

• Payload schema endpoint

• Payload schema validation

• More descriptive message for unsupported schema

• Payload schema access check

• Add feature schema modal

• Payload schema store

• Merge tags on rename

• Add new bare create flag dialog with expected lifetime

• Predefined schema list

• New experimental install type that can be used by addon scheme

• Add expectedLifetimeEndsAt to admin GET feature payload

• Add custom date picking option for flag expected lifetime

• Add frontend validation for renaming tags

• New invite signup page behind newInviteFlow flag (#12730)

• Add expected lifetime and permanent flag cleanup reminders

• Reorganize the form into sections

• Core projects listing

• Define a frontend model for a survey

• Merge Segments and Constraints into Target audience

• Core project features listing

• Segment Section design updates

• Add naming pattern hint in new create feature dialog

• Hooks for creating a survey

• Store feedback survey responses

• Show customer logos on invite page panel (#12738)

• Bulk deletion of users based on inactivity

• Add optional settings with impression data to new create feature dialog

• Create survey component

• Set password step in new invite signup flow (#12739)

• Manual mapping of github repos

• Survey question fields

• Survey card

• Define a feature flag to kill single eval endpoint

• Add support for single flag evaluations

• Wire up the new read model in the playground service

• Log in automatically after setting password in new invite flow (#12740)

• Add multi-choice option to the survey

• Add tags section to optional settings in new create feature dialog

• Generate Orval types for survey responses

• New segment selection box

• Move Segment preview to tooltip

• Final setup of Install & connect using app manifest flow

• Suppression logic for surveys

• Constraint section redesign

• Survey delivery

• Accept survey responses on the public /feedback endpoint

• New addon definition properties that allows pre-selecting and hiding events and/or environments.

• Add tracking to new create feature dialog

• Add submit url to the survey configuration

• Require environmentId when submitting survey responses

• Add environmentId field to the creator

• Update context field selector design

• Add survey responses endpoint returning not found

• Per-instance bucket offset for user sync job

• Input field to configure submit URL

• Survey draft model

• Survey question cards for rating and free-text questions

• Multiple choice options in the survey question card

• Update constraint operator selector design

• Replace the survey JSON editor with the question builder

• Move focus to the first invalid survey field on submit

• Update 'Match'/'Does not match' toggle design

• Release editable instance name on cloud

• Add *.app.unleash-hosted to CSP-allowed urls

• Update Case-sensitive toggle design

• 'Add constraint' field selection popover

• Add legal values count into field selection popover

• Update rollout slider in new strategy form accordion

• Add advanced settings to new flexible strategy

• New Constraint value input UX

• Pagination in list feedback responses API

• Add disabled option support to SelectPopover

• Add total, offset and limit to list responses api

• Add variants empty state in new strategy form

Miscellaneous Tasks

• Revert rate limit search features and add proper types

• Sync Unleash/unleash main

• Sync Unleash/unleash main

• Sync Unleash/unleash main

• Sync Unleash/unleash main

• Sync Unleash/unleash main

• Sync Unleash/unleash main

• New flag editableInstanceName

• Clamp exposure valure for automations

• Update Admin settings -> Network -> Traffic graph to match analytics

• Sync Unleash/unleash main

• New admin instance name page placeholder

• Sync Unleash/unleash main

• Remove unused newProfileDropdown

• Clean up topLabelInputs flag

• Auto-focus search on open

• Add playgroundperflag feature flag

• Migrate existing strategy-related tracking

• Sync Unleash/unleash main

• Name journey types verb-object, kebab-case all events

• Deprecate unused fields in project schema

• Count conflicting change requests on edit-strategy

• Drop the customer names and ids still sent on rows

• Rename local hooks that shadow useTracking

• Refactor PageHeader props

• Show unleash instance name

• Ran orval, generating models for new project addon endpoints

• Deprecate ConditionallyRender

• Edit instance name

• Remove usersTabsUI flag (#12676)

• Add event log recort for changed cloud settings

• Move default strategy helpers out of the playground evaluator

• Adds githubIntegration flag

• Clean up flagStatusTooltips flag

• Remove unused evaluator options and providers

• Correct typo in featureTypeSchema

• Add newUserInviteDialog flag

• Add feature flag for kvp editing in the front end.

• Add perFlagLifetime flag

• Regenerate orval (for tags project + catch up)

• Bring back the border of the strategy flow

• Rename newUserInviteDialog flag to newUserInviteFlow

• Add tracking

• simplerStrategySetup flag clean up - part 1 - move tests

• SimplerStrategySetup flag clean up - part 2 - remove the flag

• simplerStrategySetup flag clean up - part 3 - delete unused code

• simplerStrategySetup flag clean up - part 4 - drop unused options and move wizard components

• Sync Unleash/unleash main

• Remove Plausible tracking from the admin UI

• Log docker logs on e2e test fail

• Break out CreateFeatureDialog sidebar into reusable component

• New invite button in header

• Security maintenance

• Fix pnpm in the frontend directory

• Forbid Node.js builtin imports in frontend source

• Clean up feature release plans leftovers

• Add tracking for sorting tag types and tag value tables

• Add singlePageStrategyForm flag

• Remove the Plausible chart from impact metrics

• Bump MUI to v9.4

• Split out new Strategy form; rename existing to Legacy

• Align the permissions for renaming and deleting

• Flip cancel/save buttons in strategy edit/create dialog

• Remove dead queryMissingTokens experimental flag (#12729)

• Define a flag for feedback module

• Split feature toggle create read type

• Split FeatureStrategySegmentChip

• Sync Unleash/unleash main

• Add "in plain text" base component

• Remove flag for secure account tokens

• Remove legacy token cache after promise cache rollout

• Remove secure token storage rollout flag

• Clean up newUserInviteFlow

• Fix font size and padding of plain text accordion

• Split FeatureStrategyConstraints

• Add feedbackModuleDisplaySurvey flag

• Improve new create feature dialog

• Add new dashboardV2 flag

• Split ConstraintOperatorSelect and ToggleConstraintCaseSensitivity

• Add basic strategy description to plain text description

• Use a separate flag for controlling submit responses API

• Split Regex and Date constraint value components

• Add repositories prop to github addon and hide from integration setup

• Use bulk insert for milestone strategy segments

• Replace hand-rolled useId hook with React's version

• Rate limit playground

• Is supposed to improve text around github cleanup integration

• Use radios for matches / does not match instead of toggle buttons

• Rename NewStrategyVariants to StrategyVariants

• Add variant description to plain text description

• Remove deprecated IFeatureVariant in favor of VariantSchema

• Remove flag for playground in flag page

• Move single flag playground endpoint to beta

• Remove "this is an experimental property" from strat-level variants

• Always show remote MCP feedback toggle

• Clean up totalUsageMetrics feature flag

• Clean up exposureBasedAutomation feature flag

• Remove releaseTemplatesAutomations flag

• Remove the tagManagementViaUi flag

• Mark tag management endpoints as stable in 8.3.0

Performance

• Scope feature search metrics to requested page

• Aggregate feature search tags after paging

• Avoid OR-join on dependent_features in feature search (#12624)

• Don't rerender ProjectFeatureToggles on every parent render

• Cache serialized client-features response to cut cold-start memory (#12741)

Refactor

• One bound useTracking hook, no dialog hook

• Colour system cleanup — container recipe + palette semantics (#12574)

• Simpler strategy setup - part 5b - extract useAddReleasePlan

• Extract NoReleaseTemplatesMessage and ReleaseTemplateCard

• UseTracking returns one callable per journey

• Dialogue onSubmit union with required tracking

• Cloud vs self-hosted endpoints

• Rename read model to validator

• H3/h4/caption + body to 14px, replace h4 with overline

• Get potentially stale count from the features table

• Reuse Node SDK for feature evaluation

• Early return if flag is missing

• Move save flow from toggle to admin page

• Extract ToggleCard

• Providers behind feature flags now declares it themselves, handled generically by addon-service

• Extract shared validation patterns in addon creation/updates

• Retire newModalDesign flag and default to new design

• Split create feature dialog into legacy and new component

• Removing extra dependencies

• Rename EditPayloadSchema to PayloadSchemaSidebar

• Make scheduler initial delay a named option

• Move complex single-feature query into a new read model

• Reduce load of e2e tests and relocate file

• Rename MultiSelectPopover and extend with single selection and options grouping

• SelectPopover values arity cleanup

• Speed up search features query

• Split SelectPopover into reusable elements

• Better EditableConstraint / AddValueInline responsiblities split

Styling

• Enforce useExhaustiveDependencies in IntegrationForm

Testing

• Raise global vitest timeouts for the frontend suite (#12623)

• Improved playground tests

• Kvp impl in integration form

• Prove the session timeouts against real Postgres - EG-4708

• TestServerRoute can answer with an empty body

• Wait for form saves to navigate back in e2e specs