Bleach: URI sanitization allows disallowed URI schemes with Unicode > U+00A0 in output

Impact A possible XSS bypass affects users calling bleach.clean with all of: a in the allowed tags href in allowed attributes The bleach.clean sanitizer outputs URIs containing disallowed scheme patterns that it should be stripping. However, because the inserted Unicode characters make the scheme...

PYSEC-2018-51

An issue was discovered in Bleach 2.1.x before 2.1.3. Attributes that have URI values weren't properly sanitized if the values contained character entities. Using character entities, it was possible to construct a URI value with a scheme that was not allowed that would slide through unsanitized...