CVE-2020-6817

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']}).

• https://bugzilla.mozilla.org/show_bug.cgi?id=1623633
  ExploitIssue Tracking
• https://github.com/mozilla/bleach/security/advisories/GHSA-vqhp-cxgc-6wmm
  Vendor Advisory
• https://bugzilla.mozilla.org/show_bug.cgi?id=1623633
  ExploitIssue Tracking
• https://github.com/mozilla/bleach/security/advisories/GHSA-vqhp-cxgc-6wmm
  Vendor Advisory