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FreeBSD : py-bleach -- regular expression denial-of-service (4c52ec3c-86f3-11ea-b5b4-641c67a117d8)

Description

Bleach developers reports : bleach.clean behavior parsing style attributes could result in a regular expression denial of service (ReDoS). Calls to bleach.clean with an allowed tag with an allowed style attribute are vulnerable to ReDoS. For example, bleach.clean(..., attributes={'a': ['style']}).


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