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MEDIUM6.1

PYSEC-2026-635

Open Redirect in Flask-AppBuilder

Quick fix

PYSEC-2026-635 — flask-appbuilder: upgrade to the fixed version with the command below.

pip install --upgrade 'flask-appbuilder>=3.4.5'

Details

Flask-AppBuilder is an application development framework built on top of Flask. Versions prior to 3.4.5 contain an open redirect vulnerability when using the database authentication login page. There are no known workarounds. Users are recommended to upgrade to version 3.4.5 or later.

### For more information If you have any questions or comments about this advisory: * Open an issue in [Flask-AppBuilder](https://github.com/dpgaspar/Flask-AppBuilder)

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/flask-appbuilder
Introduced in: 0Fixed in: 3.4.5
Fixpip install --upgrade 'flask-appbuilder>=3.4.5'

References