{"cve":{"cve_id":"CVE-2020-6817","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.00718,"epss_percentile":0.49024,"epss_as_of":"2026-06-23","description":"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']}).","published_at":"2023-02-16T00:00:00Z","last_modified_at":null,"cvss_v3_score":7.5,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvss_v3_severity":"HIGH","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"poc","ssvc_automatable":true,"ssvc_technical_impact":"partial","cwes":["CWE-1333"],"nvd_references":["https://github.com/mozilla/bleach/security/advisories/GHSA-vqhp-cxgc-6wmm","https://bugzilla.mozilla.org/show_bug.cgi?id=1623633"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:14:30.539432Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"N","value_label":"None"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"mozilla","vendor_name":"Mozilla","product_slug":"mozilla-bleach","product_name":"Mozilla Bleach","version_start":"unspecified","version_start_inclusive":true,"version_end":"3.1.4","version_end_inclusive":false,"cpe23_uri":"cve5:mozilla:mozilla-bleach:unspecified:3.1.4"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/mozilla/bleach/security/advisories/GHSA-vqhp-cxgc-6wmm","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1623633","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2023-02-16T00:00:00Z","label":"CVE published","source":null},{"type":"ssvc_changed","at":"2026-06-24T00:31:35.223313Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-24T00:31:35.223313Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-24T00:31:35.223313Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:35.223313Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:35.223313Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:35.223313Z","label":"CVSS score revised","source":"vulnrichment"}]}