{"cve":"CVE-2023-27537","nvd":{"published":"2023-03-30T20:15:07.617","modified":"2026-10-23T23:10:00.157","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","score":5.9},"cwes":["CWE-415"],"references":["https://hackerone.com/reports/1897203","https://security.gentoo.org/glsa/202310-12","https://security.netapp.com/advisory/ntap-20230420-0010/","https://hackerone.com/reports/1897203","https://security.gentoo.org/glsa/202310-12"],"products":["broadcom:brocade_fabric_operating_system_firmware","haxx:libcurl","netapp:active_iq_unified_manager","netapp:clustered_data_ontap","netapp:h300s_firmware","netapp:h410s_firmware","netapp:h500s_firmware","netapp:h700s_firmware","splunk:universal_forwarder"],"source":"nvd","synced_at":"2026-10-24T16:53:27.712498749+00:00"},"epss":{"cve":"CVE-2023-27537","score":0.01898,"percentile":0.79503,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}