An issue was discovered in Django 5.0 before 5.0.7 and 4.2 before 4.2.14. Derived classes of the django.core.files.storage.Storage base class, when they override generate_filename() without replicating the file-path validations from the parent class, potentially allow directory traversal via certain inputs during a save() call. (Built-in Storage sub-classes are unaffected.)

References

• https://nvd.nist.gov/vuln/detail/CVE-2024-39330
• https://docs.djangoproject.com/en/dev/releases/security
• https://groups.google.com/forum/#%21forum/django-announce
• https://www.djangoproject.com/weblog/2024/jul/09/security-releases
• django/django@2b00edc
• django/django@9f4f63e
• https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2024-58.yaml