---
title: "TYPO3 Exception 1533818591"
manual: "TYPO3 Exceptions"
version: "main"
permalink: "https://docs.typo3.org/permalink/t3exceptions:typo3-exception-1533818591"
source: "Exceptions/1533818591.rst"
modified: "2026-09-16T07:39:08+00:00"
---

# TYPO3 Exception 1533818591

> [!NOTE]
> Below, the TYPO3 community may have provided additional information or
> solutions for this exception. However, these may or may not apply to your
> particular case. If you can provide more information, you should come back
> here and add your experience and solution steps to this issue once you have
> resolved it.
>
> General TYPO3 troubleshooting tips can be found in the *Troubleshooting*
> section in the menu. You can also ask questions and receive support in the
> [TYPO3 Questions category on talk.typo3.org](https://talk.typo3.org/c/typo3-questions/).
>
> To add your experience, click "Edit on GitHub" above and follow the
> ["Edit on GitHub" workflow](https://docs.typo3.org/m/typo3/docs-how-to-document/main/en-us/Howto/EditOnGithub.html#docs-contribute-github-method).
> Also check out
> [our tip on Coding Style and reST](https://docs.typo3.org/permalink/t3exceptions:tip-about-rest-coding-style).

## InvalidPasswordHashException: No implementation found that handles given hash

The following exception may bubble up since TYPO3 v9 during login:

```
#1533818591 TYPO3\CMS\Core\Crypto\PasswordHashing\InvalidPasswordHashException
No implementation found that handles given hash. This happens if the
stored hash uses a mechanism not supported by current server.

```

## Explanation

A frontend user, a backend user or the install tool password hash is
stored using a mechanism not supported by the current server. The login
process can not compare the given password with the stored hash.

## Reasons

This typically happens if a TYPO3 upgrade is performed on a system that
supports the default hash mechanism *argon2i*, passwords in the database
and/or the install tool password is updated to use this hash, and the
system is then deployed to a system that does not support *argon2i*.

## Solutions

Please see [Password hashing troubleshooting](https://docs.typo3.org/m/typo3/reference-coreapi/main/en-us/ApiOverview/PasswordHashing/Troubleshooting.html#password-hashing_troubleshooting).

## More information

-   [Official password hashing documentation since TYPO3
    v9](https://docs.typo3.org/typo3cms/CoreApiReference/ApiOverview/PasswordHashing/Index.html)
-   [Issue explaining the deployment
    problem](https://forge.typo3.org/issues/86155)