CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2020-6817
High (7.5) in mozilla bleach. EPSS 0.7% chance of exploitation in the next 30 days. Fixed in bleach 3.1.4.
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']}).
Severity
- EPSS
- 0.7% chance of exploitation in the next 30 days; higher than 53% of CVEs (scores of 2026-10-31)
- CWE
- CWE-1333
- Published
- Modified
- Record from
- the NVD, synced
Affected
- mozilla:bleach
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-vqhp-cxgc-6wmm | PyPI | bleach | <3.1.4 | 3.1.4 |
| PYSEC-2020-340 | PyPI | bleach | <3.1.4 | 3.1.4 |