{"cve":{"cve_id":"CVE-2026-40701","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":0.00677,"epss_percentile":0.47458,"epss_as_of":"2026-06-23","description":"NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_ssl_module module when the ssl_verify_client directive is set to \"on\" or \"optional,\" and the ssl_ocsp directive is set to \"on\" or the leaf parameters are configured with a resolver. With this configuration, an unauthenticated attacker can send requests along with conditions beyond its control that may cause a heap-use-after-free error in the NGINX worker process. This vulnerability may result in limited modification of data or the NGINX worker process restarting.\n\n\n\n Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.","published_at":"2026-05-13T14:12:43.588000Z","last_modified_at":null,"cvss_v3_score":4.8,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L","cvss_v3_severity":"MEDIUM","cvss_v4_score":6.3,"cvss_v4_vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N","cvss_v4_severity":"MEDIUM","ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-416"],"nvd_references":["https://my.f5.com/manage/s/article/K000161021"],"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":"2026-06-28T23:30:13.001601Z"},"effective_severity":"MEDIUM","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":"H","value_label":"High"},{"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":"L","value_label":"Low"},{"metric":"I","name":"Integrity","value":"N","value_label":"None"},{"metric":"A","name":"Availability","value":"L","value_label":"Low"}]},"cvss_v4_decoded":{"version":"4.0","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"AT","name":"Attack Requirements","value":"P","value_label":"Present"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"VC","name":"Confidentiality (Vulnerable System)","value":"L","value_label":"Low"},{"metric":"VI","name":"Integrity (Vulnerable System)","value":"N","value_label":"None"},{"metric":"VA","name":"Availability (Vulnerable System)","value":"L","value_label":"Low"},{"metric":"SC","name":"Confidentiality (Subsequent System)","value":"N","value_label":"None"},{"metric":"SI","name":"Integrity (Subsequent System)","value":"N","value_label":"None"},{"metric":"SA","name":"Availability (Subsequent System)","value":"N","value_label":"None"}]},"affected":[{"vendor_slug":"f5","vendor_name":"F5","product_slug":"nginx-open-source","product_name":"NGINX Open Source","version_start":"1.31.0","version_start_inclusive":true,"version_end":"*","version_end_inclusive":false,"cpe23_uri":"cve5:f5:nginx-open-source:1.31.0:*"},{"vendor_slug":"f5","vendor_name":"F5","product_slug":"nginx-open-source","product_name":"NGINX Open Source","version_start":"1.19.0","version_start_inclusive":true,"version_end":"1.30.1","version_end_inclusive":false,"cpe23_uri":"cve5:f5:nginx-open-source:1.19.0:1.30.1"},{"vendor_slug":"f5","vendor_name":"F5","product_slug":"nginx-plus","product_name":"NGINX Plus","version_start":"R37","version_start_inclusive":true,"version_end":"*","version_end_inclusive":false,"cpe23_uri":"cve5:f5:nginx-plus:R37:*"},{"vendor_slug":"f5","vendor_name":"F5","product_slug":"nginx-plus","product_name":"NGINX Plus","version_start":"R36","version_start_inclusive":true,"version_end":"R36 P4","version_end_inclusive":false,"cpe23_uri":"cve5:f5:nginx-plus:R36:R36 P4"},{"vendor_slug":"f5","vendor_name":"F5","product_slug":"nginx-plus","product_name":"NGINX Plus","version_start":"R32","version_start_inclusive":true,"version_end":"R32 P6","version_end_inclusive":false,"cpe23_uri":"cve5:f5:nginx-plus:R32:R32 P6"}],"exploit_refs":[],"news":[],"references":[{"url":"https://my.f5.com/manage/s/article/K000161021","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2026-05-13T14:12:43.588000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:53:54.482027Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:53:54.482027Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:53:54.482027Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:53:54.482027Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:53:54.482027Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:53:54.482027Z","label":"CVSS score revised","source":"cvelistv5"}]}