@better-auth/cimd

[!IMPORTANT]
Action required

• If you use ID token sign-in with a provider that has no clientId, set clientId to every client ID your apps sign in with.

better-auth

Bug Fixes

• Fixed the JWT plugin to verify JWTs and session cookie-cache JWTs with the stored key's algorithm instead of the token header's, and to warn when signing or verifying a JWT without an issuer or audience

• Fixed OAuth callbacks completed through the OAuth proxy to run the same checks as the standard OAuth callback, including issuer and ID token nonce validation

• Fixed auth.api.getSession() to keep the original database error as error.cause when the session lookup fails

For detailed changes, see CHANGELOG

@better-auth/core

Bug Fixes

• Fixed mapProfileToUser failing to typecheck under exactOptionalPropertyTypes when it returns undefined for name, email, or image

• Fixed ID token sign-in to reject tokens when the provider has no client ID, since their audience cannot be checked

• Fixed a custom Facebook getUserInfo to no longer receive client-submitted access tokens issued to another Facebook app, and ID tokens missing exp or iat are now rejected

• Restored the Twitch and Paybin ID token handling from before 1.7.11, which made account info fail once the ID token stored at sign-in expired

• Added a cause option as a third argument to APIError.from() to keep the underlying error for server-side callers without exposing it in the response

For detailed changes, see CHANGELOG

@better-auth/mcp

Bug Fixes

• Fixed requireMcpAuth to accept only OAuth access tokens and reject session JWTs from the JWT plugin, even when they share the issuer and audience

For detailed changes, see CHANGELOG

@better-auth/sso

Bug Fixes

• Fixed OIDC SSO sign-in to reject ID tokens missing exp or iat and providers with an empty client ID, matching social sign-in

For detailed changes, see CHANGELOG

better-auth

Bug Fixes

• Fixed repeated PostgreSQL migration diffs for int8 columns.

• Fixed database-backed rate limiting returning an excessively large X-Retry-After value.

For detailed changes, see CHANGELOG

@better-auth/core

Bug Fixes

• Fixed plugin init returns with options: undefined failing type checks under exactOptionalPropertyTypes.

• Fixed ID token signature and claim validation for Twitch and Paybin sign-in. Custom Paybin issuers must publish RS256 signing keys at <issuer>/.well-known/jwks.json.

• Reduced installation size while preserving OpenTelemetry instrumentation attributes.

For detailed changes, see CHANGELOG

@better-auth/oauth-provider

Bug Fixes

• Fixed OpenAPI schemas for /oauth2/consent and /oauth2/continue to match their redirect responses.

• Fixed CIMD metadata refreshes overwriting concurrent administrator changes to discovered clients.

For detailed changes, see CHANGELOG

@better-auth/expo

Bug Fixes

• Fixed Expo social account linking with ID tokens when a session cookie is present.

For detailed changes, see CHANGELOG

better-auth

Bug Fixes

• Fixed Captcha and OpenAPI plugin subpath imports and type resolution for better-auth/plugins/multi-session and better-auth/test.

• Fixed Google One Tap sign-ins not recording google as the last login method.

• Fixed imports from better-auth/plugins/one-tap failing with a not-exported error.

• Fixed Google One Tap ignoring plugin-level autoSelect and cancelOnTapOutside settings.

• Fixed Google One Tap sign-ins ignoring configured Google profile mapping and user info updates.

• Fixed Google One Tap calling a prompt method unsupported by FedCM and retrying skipped prompts.

For detailed changes, see CHANGELOG

@better-auth/oauth-provider

Features

• Added optional self-service signing key rotation for private_key_jwt clients.

Bug Fixes

• Fixed valid DPoP proofs being rejected for parameterized routes and URLs with trailing slashes.

• Fixed native clients with HTTP loopback callbacks being rejected when application type inference is enabled.

• Fixed device-code clients being unable to refresh access for approved resources omitted from a token poll.

• Fixed OAuth consent without a reference overwriting or reusing consent for a different reference.

• Fixed dynamic client registration rejecting requests that include both supported and unsupported grants.

• Fixed attempts to change cached trusted clients returning HTTP 500 instead of HTTP 400.

• Improved errors for unknown OAuth client_id values to say client not found.

• Fixed PKCE verifier errors to return the specified HTTP 400 response and error code.

• Fixed unknown OAuth clients receiving invalid_grant instead of invalid_client at the token endpoint.

• Fixed unverifiable JWT access tokens causing server errors at /oauth2/userinfo, /oauth2/introspect, and /oauth2/revoke.

For detailed changes, see CHANGELOG

@better-auth/core

Bug Fixes

• Limited JWKS refetches for unknown key IDs to protect servers from repeated requests.

• Fixed unreachable JWKS endpoints being reported as invalid tokens instead of server errors.

For detailed changes, see CHANGELOG

@better-auth/mongo-adapter

Bug Fixes

• Fixed MongoDB findMany ignoring ID sorting and potentially repeating or skipping paginated results.

For detailed changes, see CHANGELOG

better-auth

Bug Fixes

• Fixed onAPIError.onError handlers to finish before responses are sent and log failures without interrupting requests

For detailed changes, see CHANGELOG

@better-auth/oauth-provider

Bug Fixes

• Added isContinuation to postLogin.shouldRedirect so users can complete authorization after selecting an organization

• Fixed DPoP validation for token and UserInfo requests behind proxies that rewrite request URLs

For detailed changes, see CHANGELOG

@better-auth/cimd

Bug Fixes

• Added support for host-bearing custom-scheme redirect URIs for native OAuth clients

For detailed changes, see CHANGELOG

better-auth

Magic Link upgrade: Upgrade servers sharing verification storage together, request new Magic Links, and restart pending OAuth/SAML sign-ins. No database migration is required. See the critical advisory for affected configurations and custom storage changes.

Bug Fixes

• security

  Fixed a critical Magic Link account-takeover vulnerability.

• Fixed ID-token sign-in ignoring the social provider’s disableSignUp setting.

• Fixed OAuth Proxy accepting sign-in state as a provider profile.
  Upgrade all OAuth Proxy participants together; see the OAuth Proxy upgrade guidance.

• Fixed CAPTCHA errors missing the JSON Content-Type header.

• Fixed the active organization failing to refresh after sign-in when a session hook selects the initial organization.

• Fixed rate-limit errors missing the JSON Content-Type header.

For detailed changes, see CHANGELOG

@better-auth/oauth-provider

Features

• Added optional validateRedirectUri validation for trusted deployments with dynamic OAuth redirect URIs.

• Added verifyOAuthQueryParams to verify signed authorization queries before rendering a custom consent page.

For detailed changes, see CHANGELOG

@better-auth/drizzle-adapter

Bug Fixes

• Fixed concurrent PostgreSQL requests exceeding database-backed rate limits.

For detailed changes, see CHANGELOG

@better-auth/kysely-adapter

Bug Fixes

• Fixed consumeOne deleting a record after a concurrent write invalidates its original condition.

For detailed changes, see CHANGELOG

better-auth

Features

• Added support for a bannedUserMessage function that receives the banned user, allowing sign-in errors to include details such as the ban reason.

• Added Vercel BotID as a captcha provider for protected authentication routes.

Bug Fixes

• Passwords over maxPasswordLength are now rejected with PASSWORD_TOO_LONG before hashing or verification.

• Fixed React hydration mismatches when session or plugin auth queries resolve before streamed components hydrate.

• Prevented older auth-query responses from overwriting newer results when requests overlap.

• Fixed model identity when a custom model name matches another schema key.

• Fixed schema validation for Cloudflare D1 when the Kysely dialect cannot introspect the database.

• Fixed social account linking through the OAuth Proxy plugin.

For detailed changes, see CHANGELOG

@better-auth/kysely-adapter

Bug Fixes

• Fixed model identity when a custom model name matches another schema key.

• Fixed schema validation for SQLite-generated primary keys, including INTEGER PRIMARY KEY columns without AUTOINCREMENT.

• Fixed schema validation for Cloudflare D1 when the Kysely dialect cannot introspect the database.

For detailed changes, see CHANGELOG

@better-auth/prisma-adapter

Bug Fixes

• Fixed model identity when a custom model name matches another schema key.

• Fixed schema validation for capitalized custom Prisma model names.

For detailed changes, see CHANGELOG

@better-auth/core

Bug Fixes

• Fixed model identity when a custom model name matches another schema key.

For detailed changes, see CHANGELOG

@better-auth/drizzle-adapter

Bug Fixes

• Fixed model identity when a custom model name matches another schema key.

For detailed changes, see CHANGELOG

@better-auth/memory-adapter

Bug Fixes

• Fixed model identity when a custom model name matches another schema key.

For detailed changes, see CHANGELOG

@better-auth/mongo-adapter

Bug Fixes

• Fixed model identity when a custom model name matches another schema key.

For detailed changes, see CHANGELOG

@better-auth/stripe

Bug Fixes

• Fixed automatic seat updates after an organization resubscribes, even when canceled subscriptions remain in its history.

For detailed changes, see CHANGELOG

auth

Features

• Added read-only check and check schema commands to validate your configured adapter schema on demand.

For detailed changes, see CHANGELOG

@better-auth/cimd

Bug Fixes

• Fixed unnecessary pacing of consecutive CIMD OAuth requests when metadata cannot be cached.

For detailed changes, see CHANGELOG

better-auth

Features

• Added experimental.instrumentation.enabled to disable OpenTelemetry span creation per auth instance.

• Added support for additional session fields in testUtils auth helpers.

• Added Vitest 5 support to the testing utilities.

For detailed changes, see CHANGELOG

@better-auth/core

Features

• Added experimental.instrumentation.enabled to disable OpenTelemetry span creation per auth instance.

Bug Fixes

• Fixed Metro bundling when the optional OpenTelemetry API is not installed.

For detailed changes, see CHANGELOG

@better-auth/expo

Bug Fixes

• Fixed multibyte session data storage in Expo SecureStore.

• Fixed stale Expo secure-storage session data and corrupted cookies during concurrent updates.

For detailed changes, see CHANGELOG

@better-auth/drizzle-adapter

Bug Fixes

• Improved schema validation for the Drizzle Relations v2 adapter.

For detailed changes, see CHANGELOG

@better-auth/test-utils

Features

• Added Vitest 5 support to the testing utilities.

For detailed changes, see CHANGELOG

@better-auth/cimd

Bug Fixes

• Fixed CIMD client metadata discovery failures with ERR_INVALID_IP_ADDRESS on supported Node.js versions.

For detailed changes, see CHANGELOG

better-auth

Bug Fixes

• Fixed permanent user bans to clear expiration dates from previous temporary bans.

• Fixed client types with more plugins being assignable to types declaring fewer plugins.

• Added warnings for invalid signed session data in the cookie cache.

• Fixed disabled MyISAM indexes from satisfying migration index checks.

• Fixed programmatic migrations on Cloudflare D1 while preserving existing-index validation.

• Allowed ~ in relative callback URLs validated by trusted-origin checks.

• Improved validation of relative callback and redirect URLs with paths, queries, and fragments.

• Allowed same-origin form submissions with Referrer-Policy: no-referrer while continuing to reject untrusted origins.

• Improved getTestInstance performance with a faster default password hasher.

• Standardized built-in placeholder emails to the namespaced {identifier}@{namespace}.placeholder.invalid format.

For detailed changes, see CHANGELOG

@better-auth/core

Bug Fixes

• Fixed async context loss in Cloudflare Workers bundles with multiple runtime conditions.

• Fixed auth request logs to respect the configured logger, log level, and disabled setting.

• Improved validation of relative callback and redirect URLs with paths, queries, and fragments.

• Standardized built-in placeholder emails to the namespaced {identifier}@{namespace}.placeholder.invalid format.

• Added synchronous and optional access to the current auth endpoint context.

For detailed changes, see CHANGELOG

@better-auth/oauth-provider

Bug Fixes

• Fixed Client ID Metadata Document registration when clients share at least one supported grant with the server.

• Improved validation of relative callback and redirect URLs with paths, queries, and fragments.

• Fixed relative redirect URLs containing fragments.

For detailed changes, see CHANGELOG

@better-auth/drizzle-adapter

Bug Fixes

• Fixed one-to-one Drizzle relations when usePlural is enabled.

• Added validation for missing Drizzle schema fields in compound where clauses.

For detailed changes, see CHANGELOG

@better-auth/kysely-adapter

Bug Fixes

• Fixed programmatic migrations on Cloudflare D1 while preserving existing-index validation.

For detailed changes, see CHANGELOG

@better-auth/sso

Bug Fixes

• Improved validation of relative callback and redirect URLs with paths, queries, and fragments.

For detailed changes, see CHANGELOG

@better-auth/cimd

Bug Fixes

• Fixed Client ID Metadata Document caching to follow shared-cache freshness rules: the plugin now prefers s-maxage over max-age and Expires, honors s-maxage=0, conditionally revalidates with ETag or Last-Modified, and treats invalid or duplicate freshness directives as immediately stale. Concurrent refreshes now converge on a single client-resource link instead of failing on a unique constraint.

For detailed changes, see CHANGELOG

@better-auth/cimd

Breaking Changes

• breaking

  Aligned OAuth client registration and metadata with MCP authorization 2026-07-28

  Migration: Add applicationType and nullable clientDiscoveryId columns, deduplicate existing (clientId, resourceId) links before the new compound unique index, then drop the legacy type and public columns. Client ID Metadata Documents preserve an omitted application_type as null and cannot assign clientCredentialsScopes. Compose mcp() with cimd() for metadata-document clients.

Features

• Added the @better-auth/cimd Client ID Metadata Document plugin

Bug Fixes

• Client ID Metadata Documents now follow shared-cache freshness rules and fail closed when freshness is ambiguous. The plugin prefers s-maxage over max-age and Expires, honors s-maxage=0, revalidates conditionally with ETag or Last-Modified, and treats invalid or duplicate freshness directives as immediately stale. Concurrent refreshes converge on one client-resource link instead of failing on its unique constraint.

For detailed changes, see CHANGELOG