{"cve":{"cve_id":"CVE-2019-11707","is_kev":true,"kev_date_added":"2022-05-23","kev_vendor_project":"Mozilla","kev_product":"Firefox and Thunderbird","kev_vulnerability_name":"Mozilla Firefox and Thunderbird Type Confusion Vulnerability","kev_short_description":"Mozilla Firefox and Thunderbird contain a type confusion vulnerability that can occur when manipulating JavaScript objects due to issues in Array.pop, allowing for an exploitable crash.","kev_required_action":"Apply updates per vendor instructions.","kev_due_date":"2022-06-13","kev_known_ransomware":false,"kev_notes":"https://nvd.nist.gov/vuln/detail/CVE-2019-11707","kev_cwes":["CWE-843"],"epss_score":0.37951,"epss_percentile":0.98354,"epss_as_of":"2026-06-23","description":"A type confusion vulnerability can occur when manipulating JavaScript objects due to issues in Array.pop. This can allow for an exploitable crash. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Firefox ESR < 60.7.1, Firefox < 67.0.3, and Thunderbird < 60.7.2.","published_at":"2019-07-23T13:20:17Z","last_modified_at":null,"cvss_v3_score":8.8,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cvss_v3_severity":"HIGH","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"active","ssvc_automatable":false,"ssvc_technical_impact":"total","cwes":["CWE-843"],"nvd_references":["https://www.mozilla.org/security/advisories/mfsa2019-20/","https://www.mozilla.org/security/advisories/mfsa2019-18/","https://bugzilla.mozilla.org/show_bug.cgi?id=1544386","https://security.gentoo.org/glsa/201908-12"],"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":"2026-06-24T00:09:31.350578Z","updated_at":"2026-06-28T23:11:58.803949Z"},"effective_severity":"HIGH","badges":["kev"],"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":"R","value_label":"Required"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"mozilla","vendor_name":"Mozilla","product_slug":"firefox","product_name":"Firefox","version_start":"unspecified","version_start_inclusive":true,"version_end":"67.0.3","version_end_inclusive":false,"cpe23_uri":"cve5:mozilla:firefox:unspecified:67.0.3"},{"vendor_slug":"mozilla","vendor_name":"Mozilla","product_slug":"firefox-esr","product_name":"Firefox ESR","version_start":"unspecified","version_start_inclusive":true,"version_end":"60.7.1","version_end_inclusive":false,"cpe23_uri":"cve5:mozilla:firefox-esr:unspecified:60.7.1"},{"vendor_slug":"mozilla","vendor_name":"Mozilla","product_slug":"thunderbird","product_name":"Thunderbird","version_start":"unspecified","version_start_inclusive":true,"version_end":"60.7.2","version_end_inclusive":false,"cpe23_uri":"cve5:mozilla:thunderbird:unspecified:60.7.2"}],"exploit_refs":[],"news":[],"references":[{"url":"https://www.mozilla.org/security/advisories/mfsa2019-20/","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2019-18/","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1544386","source_type":"MISC","tags":[]},{"url":"https://security.gentoo.org/glsa/201908-12","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2019-07-23T13:20:17Z","label":"CVE published","source":null},{"type":"cisa_reported","at":"2022-05-23T00:00:00Z","label":"Added to CISA KEV catalog","source":"kev"},{"type":"ssvc_changed","at":"2026-06-24T00:31:17.516004Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-24T00:31:17.516004Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-24T00:31:17.516004Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:17.516004Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:17.516004Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:17.516004Z","label":"CVSS score revised","source":"vulnrichment"}]}