CVE-2020-6817 (GCVE-0-2020-6817)
Vulnerability from cvelistv5
Published
2023-02-16 00:00
Modified
2025-03-19 15:21
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • regular expression denial-of-service (ReDoS) in BleachSanitizerFilter.sanitize_css gauntlet regular expression
Summary
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']}).
References
Impacted products
Vendor Product Version
Mozilla Mozilla Bleach Version: unspecified   < 3.1.4
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