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Fix4.17.2

v4.17.2

This release includes bug fixes for caching and relations of well-known app link files, cross-instance caching prevention, console support for Zitadel Support IDP, login flow improvements including proper IdP URL handling and account selection after logout, OIDC token exchange enhancements, and TOTP reuse prevention for improved security.

4.17.2 (2026-08-31)

Bug Fixes

apioidcloginsecurityidpcaching

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Fix4.19.4

v4.19.4 Bug Fixes

This release includes bug fixes for the async execution worker context not having the instance ID set, corrects the ID order in the invite code notification handler, and improves handling of finalized unique-constraint backfill and exclusive owner deletes.

bugfixactionsnotificationsdatabase
Improvement4.19.3

Performance improvements for user queries

Improved performance of user listing queries by indexing users by instance and organization, and stopped expanding login names for every ListUsers row to reduce database load.

performancequerydatabaseusers
Security4.19.2

v4.19.2 – Security fixes for SAML, session cookies, and impersonation

This release fixes three security vulnerabilities including SAML identity-provider confusion leading to account takeover, unsigned Login V2 session cookie vulnerability, and unauthorized administrator impersonation. All 4.x deployments should upgrade and configure the new ZITADEL_SESSION_COOKIE_SECRET for Login V2.

securitysamlauthenticationsessionimpersonation
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