23 lines
978 B
Plaintext
23 lines
978 B
Plaintext
===========================
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Django 2.2.22 release notes
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===========================
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*May 6, 2021*
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Django 2.2.22 fixes a security issue in 2.2.21.
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CVE-2021-32052: Header injection possibility since ``URLValidator`` accepted newlines in input on Python 3.9.5+
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===============================================================================================================
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On Python 3.9.5+, :class:`~django.core.validators.URLValidator` didn't prohibit
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newlines and tabs. If you used values with newlines in HTTP response, you could
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suffer from header injection attacks. Django itself wasn't vulnerable because
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:class:`~django.http.HttpResponse` prohibits newlines in HTTP headers.
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Moreover, the ``URLField`` form field which uses ``URLValidator`` silently
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removes newlines and tabs on Python 3.9.5+, so the possibility of newlines
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entering your data only existed if you are using this validator outside of the
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form fields.
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This issue was introduced by the :bpo:`43882` fix.
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