{"cve":{"cve_id":"CVE-2023-5176","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":0.01233,"epss_percentile":0.65131,"epss_as_of":"2026-06-23","description":"Memory safety bugs present in Firefox 117, Firefox ESR 115.2, and Thunderbird 115.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 118, Firefox ESR < 115.3, and Thunderbird < 115.3.","published_at":"2023-09-27T14:13:25.411000Z","last_modified_at":null,"cvss_v3_score":9.8,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_v3_severity":"CRITICAL","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"none","ssvc_automatable":true,"ssvc_technical_impact":"total","cwes":["CWE-787"],"nvd_references":["https://bugzilla.mozilla.org/buglist.cgi?bug_id=1836353%2C1842674%2C1843824%2C1843962%2C1848890%2C1850180%2C1850983%2C1851195","https://www.mozilla.org/security/advisories/mfsa2023-41/","https://www.mozilla.org/security/advisories/mfsa2023-42/","https://www.mozilla.org/security/advisories/mfsa2023-43/","https://www.debian.org/security/2023/dsa-5506","https://lists.debian.org/debian-lts-announce/2023/09/msg00034.html","https://www.debian.org/security/2023/dsa-5513","https://lists.debian.org/debian-lts-announce/2023/10/msg00015.html"],"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":"2026-06-29T01:44:00.801837Z"},"effective_severity":"CRITICAL","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":"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":"118","version_end_inclusive":false,"cpe23_uri":"cve5:mozilla:firefox:unspecified:118"},{"vendor_slug":"mozilla","vendor_name":"Mozilla","product_slug":"firefox-esr","product_name":"Firefox ESR","version_start":"unspecified","version_start_inclusive":true,"version_end":"115.3","version_end_inclusive":false,"cpe23_uri":"cve5:mozilla:firefox-esr:unspecified:115.3"},{"vendor_slug":"mozilla","vendor_name":"Mozilla","product_slug":"thunderbird","product_name":"Thunderbird","version_start":"unspecified","version_start_inclusive":true,"version_end":"115.3","version_end_inclusive":false,"cpe23_uri":"cve5:mozilla:thunderbird:unspecified:115.3"}],"exploit_refs":[],"news":[],"references":[{"url":"https://bugzilla.mozilla.org/buglist.cgi?bug_id=1836353%2C1842674%2C1843824%2C1843962%2C1848890%2C1850180%2C1850983%2C1851195","source_type":"MISC","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2023-41/","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2023-42/","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2023-43/","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://www.debian.org/security/2023/dsa-5506","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2023/09/msg00034.html","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://www.debian.org/security/2023/dsa-5513","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2023/10/msg00015.html","source_type":"MAILING_LIST","tags":["mailing-list"]}],"timeline":[{"type":"published","at":"2023-09-27T14:13:25.411000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:31:42.938024Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:31:42.938024Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:31:42.938024Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"ssvc_changed","at":"2026-06-29T01:44:00.801837Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T01:44:00.801837Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T01:44:00.801837Z","label":"SSVC decision revised","source":"vulnrichment"}]}