--- title: "typo3/cms-core Breaking Changes on Packagist | Since.dev" description: "What each typo3/cms-core release removed, renamed or changed: 2,932 breaking changes in 3 versions on Packagist, each with its source." canonical_url: https://since.dev/packages/packagist/typo3/cms-core last_updated: 2025-11-25 --- # typo3/cms-core breaking changes Every breaking API change we have recorded in typo3/cms-core on Packagist: 2,932 breaking changes in 3 versions. Below are its newest 3 versions, removals and renames first, each with its source. Newest change November 25, 2025 ## v14.0.0 716 breaking changes, first published November 25, 2025. - **Removed** `TYPO3\CMS\Core\Authentication\BackendUserAuthentication::returnWebmounts` Use getWebmounts instead. [packagist.org](https://packagist.org/packages/typo3/cms-core#v14.0.0) - **Removed** `TYPO3\CMS\Core\Cache\Backend\AbstractBackend::$cache` TYPO3\\CMS\\Core\\Cache\\Backend\\AbstractBackend::$cache was removed in typo3/cms-core v14.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v14.0.0) - **Removed** `TYPO3\CMS\Core\Cache\Backend\AbstractBackend::$context` TYPO3\\CMS\\Core\\Cache\\Backend\\AbstractBackend::$context was removed in typo3/cms-core v14.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v14.0.0) - **Removed** `TYPO3\CMS\Core\Cache\Backend\AbstractBackend::calculateExpiryTime` TYPO3\\CMS\\Core\\Cache\\Backend\\AbstractBackend::calculateExpiryTime was removed in typo3/cms-core v14.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v14.0.0) - **Removed** `TYPO3\CMS\Core\Cache\Backend\AbstractBackend::DATETIME_EXPIRYTIME_UNLIMITED` TYPO3\\CMS\\Core\\Cache\\Backend\\AbstractBackend::DATETIME_EXPIRYTIME_UNLIMITED was removed in typo3/cms-core v14.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v14.0.0) - **Removed** `TYPO3\CMS\Core\Cache\Backend\AbstractBackend::flushByTags` TYPO3\\CMS\\Core\\Cache\\Backend\\AbstractBackend::flushByTags was removed in typo3/cms-core v14.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v14.0.0) - **Removed** `TYPO3\CMS\Core\Cache\Backend\AbstractBackend::setDefaultLifetime` TYPO3\\CMS\\Core\\Cache\\Backend\\AbstractBackend::setDefaultLifetime was removed in typo3/cms-core v14.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v14.0.0) - **Removed** `TYPO3\CMS\Core\Cache\Backend\AbstractBackend::UNLIMITED_LIFETIME` TYPO3\\CMS\\Core\\Cache\\Backend\\AbstractBackend::UNLIMITED_LIFETIME was removed in typo3/cms-core v14.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v14.0.0) - **Removed** `TYPO3\CMS\Core\Cache\Backend\FileBackend::freeze` TYPO3\\CMS\\Core\\Cache\\Backend\\FileBackend::freeze was removed in typo3/cms-core v14.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v14.0.0) - **Removed** `TYPO3\CMS\Core\Cache\Backend\FileBackend::isFrozen` TYPO3\\CMS\\Core\\Cache\\Backend\\FileBackend::isFrozen was removed in typo3/cms-core v14.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v14.0.0) And 706 more in this version. ## v13.0.0 1,176 breaking changes, first published January 30, 2024. - **Removed** `TYPO3\CMS\Core\Attribute\AsAllowedCallable` TYPO3\\CMS\\Core\\Attribute\\AsAllowedCallable was removed in typo3/cms-core v13.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v13.0.0) - **Removed** `TYPO3\CMS\Core\Authentication\AbstractUserAuthentication::__call` TYPO3\\CMS\\Core\\Authentication\\AbstractUserAuthentication::\_\_call was removed in typo3/cms-core v13.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v13.0.0) - **Removed** `TYPO3\CMS\Core\Authentication\AbstractUserAuthentication::__get` TYPO3\\CMS\\Core\\Authentication\\AbstractUserAuthentication::\_\_get was removed in typo3/cms-core v13.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v13.0.0) - **Removed** `TYPO3\CMS\Core\Authentication\AbstractUserAuthentication::__isset` TYPO3\\CMS\\Core\\Authentication\\AbstractUserAuthentication::\_\_isset was removed in typo3/cms-core v13.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v13.0.0) - **Removed** `TYPO3\CMS\Core\Authentication\AbstractUserAuthentication::__set` TYPO3\\CMS\\Core\\Authentication\\AbstractUserAuthentication::\_\_set was removed in typo3/cms-core v13.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v13.0.0) - **Removed** `TYPO3\CMS\Core\Authentication\AbstractUserAuthentication::__unset` TYPO3\\CMS\\Core\\Authentication\\AbstractUserAuthentication::\_\_unset was removed in typo3/cms-core v13.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v13.0.0) - **Removed** `TYPO3\CMS\Core\Authentication\AbstractUserAuthentication::getUserId` TYPO3\\CMS\\Core\\Authentication\\AbstractUserAuthentication::getUserId was removed in typo3/cms-core v13.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v13.0.0) - **Removed** `TYPO3\CMS\Core\Authentication\AbstractUserAuthentication::getUserName` TYPO3\\CMS\\Core\\Authentication\\AbstractUserAuthentication::getUserName was removed in typo3/cms-core v13.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v13.0.0) - **Removed** `TYPO3\CMS\Core\Authentication\AbstractUserAuthentication::handleLoginFailure` TYPO3\\CMS\\Core\\Authentication\\AbstractUserAuthentication::handleLoginFailure was removed in typo3/cms-core v13.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v13.0.0) - **Removed** `TYPO3\CMS\Core\Authentication\BackendUserAuthentication::getFilePermissionsForStorage` TYPO3\\CMS\\Core\\Authentication\\BackendUserAuthentication::getFilePermissionsForStorage was removed in typo3/cms-core v13.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v13.0.0) And 1,166 more in this version. ## v12.0.0 1,040 breaking changes, first published October 4, 2022. - **Removed** `TYPO3\CMS\Core\Authentication\AbstractUserAuthentication::__get` TYPO3\\CMS\\Core\\Authentication\\AbstractUserAuthentication::\_\_get was removed in typo3/cms-core v12.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v12.0.0) - **Removed** `TYPO3\CMS\Core\Authentication\AbstractUserAuthentication::__isset` TYPO3\\CMS\\Core\\Authentication\\AbstractUserAuthentication::\_\_isset was removed in typo3/cms-core v12.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v12.0.0) - **Removed** `TYPO3\CMS\Core\Authentication\AbstractUserAuthentication::__set` TYPO3\\CMS\\Core\\Authentication\\AbstractUserAuthentication::\_\_set was removed in typo3/cms-core v12.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v12.0.0) - **Removed** `TYPO3\CMS\Core\Authentication\AbstractUserAuthentication::__unset` TYPO3\\CMS\\Core\\Authentication\\AbstractUserAuthentication::\_\_unset was removed in typo3/cms-core v12.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v12.0.0) - **Removed** `TYPO3\CMS\Core\Authentication\AbstractUserAuthentication::createSessionId` TYPO3\\CMS\\Core\\Authentication\\AbstractUserAuthentication::createSessionId was removed in typo3/cms-core v12.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v12.0.0) - **Removed** `TYPO3\CMS\Core\Authentication\AbstractUserAuthentication::fetchUserSession` TYPO3\\CMS\\Core\\Authentication\\AbstractUserAuthentication::fetchUserSession was removed in typo3/cms-core v12.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v12.0.0) - **Removed** `TYPO3\CMS\Core\Authentication\BackendUserAuthentication::hasEditAccessToLiveWorkspace` TYPO3\\CMS\\Core\\Authentication\\BackendUserAuthentication::hasEditAccessToLiveWorkspace was removed in typo3/cms-core v12.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v12.0.0) - **Removed** `TYPO3\CMS\Core\Authentication\Mfa\MfaProviderInterface` TYPO3\\CMS\\Core\\Authentication\\Mfa\\MfaProviderInterface was removed in typo3/cms-core v12.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v12.0.0) - **Removed** `TYPO3\CMS\Core\Authentication\Mfa\MfaProviderPropertyManager` TYPO3\\CMS\\Core\\Authentication\\Mfa\\MfaProviderPropertyManager was removed in typo3/cms-core v12.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v12.0.0) - **Removed** `TYPO3\CMS\Core\Authentication\Mfa\MfaViewType` TYPO3\\CMS\\Core\\Authentication\\Mfa\\MfaViewType was removed in typo3/cms-core v12.0.0 [packagist.org](https://packagist.org/packages/typo3/cms-core#v12.0.0) And 1,030 more in this version. ## Check your code These are the changes. 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