{"cve":"CVE-2023-38039","nvd":{"published":"2023-09-15T04:15:10.127","modified":"2026-06-17T06:09:17.450","status":"Modified","description":"When curl retrieves an HTTP response, it stores the incoming headers so that\nthey can be accessed later via the libcurl headers API.\n\nHowever, curl did not have a limit in how many or how large headers it would\naccept in a response, allowing a malicious server to stream an endless series\nof headers and eventually cause curl to run out of heap memory.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-770"],"references":["http://seclists.org/fulldisclosure/2023/Oct/17","http://seclists.org/fulldisclosure/2024/Jan/34","http://seclists.org/fulldisclosure/2024/Jan/37","http://seclists.org/fulldisclosure/2024/Jan/38","https://hackerone.com/reports/2072338"],"products":["fedoraproject:fedora","haxx:curl","microsoft:windows_10_1809","microsoft:windows_10_21h2","microsoft:windows_10_22h2","microsoft:windows_11_21h2","microsoft:windows_11_22h2","microsoft:windows_11_23h2","microsoft:windows_server_2019","microsoft:windows_server_2022"],"source":"nvd","synced_at":"2026-10-19T21:39:24.235896374+00:00"},"epss":{"cve":"CVE-2023-38039","score":0.56371,"percentile":0.99055,"date":"2026-10-31"},"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."]}