{"cve":"CVE-2018-1000007","nvd":{"published":"2018-01-24T22:29:00.353","modified":"2026-06-17T01:32:11.740","status":"Modified","description":"libcurl 7.1 through 7.57.0 might accidentally leak authentication data to third parties. When asked to send custom headers in its HTTP requests, libcurl will send that set of headers first to the host in the initial URL but also, if asked to follow redirects and a 30X HTTP response code is returned, to the host mentioned in URL in the `Location:` response header value. Sending the same set of headers to subsequent hosts is in particular a problem for applications that pass on custom `Authorization:` headers, as this header often contains privacy sensitive information or data that could allow others to impersonate the libcurl-using client's request.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":[],"references":["http://www.openwall.com/lists/oss-security/2022/04/27/4","http://www.securitytracker.com/id/1040274","https://access.redhat.com/errata/RHBA-2019:0327","https://access.redhat.com/errata/RHSA-2018:3157","https://access.redhat.com/errata/RHSA-2018:3558"],"products":["canonical:ubuntu_linux","debian:debian_linux","fujitsu:m10-1_firmware","fujitsu:m10-4_firmware","fujitsu:m10-4s_firmware","fujitsu:m12-1_firmware","fujitsu:m12-2_firmware","fujitsu:m12-2s_firmware","haxx:curl","redhat:enterprise_linux_desktop","redhat:enterprise_linux_server","redhat:enterprise_linux_server_aus","redhat:enterprise_linux_server_eus","redhat:enterprise_linux_workstation"],"source":"nvd","synced_at":"2026-10-19T20:48:34.567387330+00:00"},"epss":{"cve":"CVE-2018-1000007","score":0.09906,"percentile":0.95582,"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."]}