{"cve":{"cve_id":"CVE-2023-27537","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":0.01898,"epss_percentile":0.79269,"epss_as_of":"2026-10-15","description":"A double free vulnerability exists in libcurl <8.0.0 when sharing HSTS data between separate \"handles\". This sharing was introduced without considerations for do this sharing across separate threads but there was no indication of this fact in the documentation. Due to missing mutexes or thread locks, two threads sharing the same HSTS data could end up doing a double-free or use-after-free.","published_at":"2023-03-30T00:00:00Z","last_modified_at":"2026-10-23T23:10:00.157000Z","cvss_v3_score":5.9,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","cvss_v3_severity":"MEDIUM","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-415"],"nvd_references":["https://hackerone.com/reports/1897203","https://security.netapp.com/advisory/ntap-20230420-0010/","https://security.gentoo.org/glsa/202310-12"],"vuln_status":"Modified","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":"2026-10-25T02:28:23.504098Z"},"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":"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":"broadcom","vendor_name":"Broadcom","product_slug":"brocade-fabric-operating-system-firmware","product_name":"brocade_fabric_operating_system_firmware","version_start":null,"version_start_inclusive":null,"version_end":null,"version_end_inclusive":null,"cpe23_uri":"cpe:2.3:o:broadcom:brocade_fabric_operating_system_firmware:-:*:*:*:*:*:*:*"},{"vendor_slug":"haxx","vendor_name":"haxx","product_slug":"libcurl","product_name":"libcurl","version_start":"7.88.0","version_start_inclusive":true,"version_end":"7.88.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:haxx:libcurl:7.88.0:*:*:*:*:*:*:*"},{"vendor_slug":"haxx","vendor_name":"haxx","product_slug":"libcurl","product_name":"libcurl","version_start":"7.88.1","version_start_inclusive":true,"version_end":"7.88.1","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:haxx:libcurl:7.88.1:*:*:*:*:*:*:*"},{"vendor_slug":"netapp","vendor_name":"NetApp","product_slug":"active-iq-unified-manager","product_name":"active_iq_unified_manager","version_start":null,"version_start_inclusive":null,"version_end":null,"version_end_inclusive":null,"cpe23_uri":"cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*"},{"vendor_slug":"netapp","vendor_name":"NetApp","product_slug":"clustered-data-ontap","product_name":"Clustered Data ONTAP","version_start":"9.0","version_start_inclusive":true,"version_end":"9.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:netapp:clustered_data_ontap:9.0:-:*:*:*:*:*:*"},{"vendor_slug":"netapp","vendor_name":"NetApp","product_slug":"h300s-firmware","product_name":"h300s_firmware","version_start":null,"version_start_inclusive":null,"version_end":null,"version_end_inclusive":null,"cpe23_uri":"cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*"},{"vendor_slug":"netapp","vendor_name":"NetApp","product_slug":"h410s-firmware","product_name":"h410s_firmware","version_start":null,"version_start_inclusive":null,"version_end":null,"version_end_inclusive":null,"cpe23_uri":"cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*"},{"vendor_slug":"netapp","vendor_name":"NetApp","product_slug":"h500s-firmware","product_name":"h500s_firmware","version_start":null,"version_start_inclusive":null,"version_end":null,"version_end_inclusive":null,"cpe23_uri":"cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*"},{"vendor_slug":"netapp","vendor_name":"NetApp","product_slug":"h700s-firmware","product_name":"h700s_firmware","version_start":null,"version_start_inclusive":null,"version_end":null,"version_end_inclusive":null,"cpe23_uri":"cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*"},{"vendor_slug":"splunk","vendor_name":"Splunk","product_slug":"universal-forwarder","product_name":"Universal Forwarder","version_start":"8.2.0","version_start_inclusive":true,"version_end":"8.2.12","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:*"},{"vendor_slug":"splunk","vendor_name":"Splunk","product_slug":"universal-forwarder","product_name":"Universal Forwarder","version_start":"9.1.0","version_start_inclusive":true,"version_end":"9.1.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:splunk:universal_forwarder:9.1.0:*:*:*:*:*:*:*"}],"exploit_refs":[],"news":[],"references":[{"url":"https://hackerone.com/reports/1897203","source_type":"MISC","tags":[]},{"url":"https://security.netapp.com/advisory/ntap-20230420-0010/","source_type":"MISC","tags":[]},{"url":"https://security.gentoo.org/glsa/202310-12","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2023-03-30T00:00:00Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-10-14T23:59:09.254433Z","label":"CVSS score revised","source":"nvd"},{"type":"cvss_changed","at":"2026-10-14T23:59:09.254433Z","label":"CVSS score revised","source":"nvd"},{"type":"cvss_changed","at":"2026-10-14T23:59:09.254433Z","label":"CVSS score revised","source":"nvd"}]}