{"id":"JLSEC-2026-1221","summary":"A vulnerability in libcurl caused the HTTP `Referer:` header to persist even when explicitly...","details":"A vulnerability in libcurl caused the HTTP `Referer:` header to persist even\nwhen explicitly cleared. While the documentation states that passing NULL to\n`CURLOPT_REFERER` suppresses the header, the option failed to clear the\ninternal state. As a result the previous referrer string was erroneously\nreused and sent in subsequent requests, potentially leaking sensitive\ninformation to unintended servers.","modified":"2026-08-07T20:29:10.841347494Z","published":"2026-08-07T20:11:58.984Z","upstream":["CVE-2026-9546","EUVD-2026-41494","GHSA-25rx-86v8-32c6"],"database_specific":{"license":"CC-BY-4.0","sources":[{"imported":"2026-08-07T19:54:39.005Z","modified":"2026-07-07T14:53:26.517Z","published":"2026-07-03T07:16:25.893Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-9546","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-9546","database_specific":{"status":"Analyzed"},"id":"CVE-2026-9546"},{"imported":"2026-08-07T19:56:10.931Z","modified":"2026-07-06T18:30:51Z","published":"2026-07-03T09:31:27Z","url":"https://api.github.com/advisories/GHSA-25rx-86v8-32c6","html_url":"https://github.com/advisories/GHSA-25rx-86v8-32c6","id":"GHSA-25rx-86v8-32c6"},{"modified":"2026-07-06T16:51:49Z","published":"2026-07-03T06:18:14Z","url":"https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-41494","html_url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-41494","id":"EUVD-2026-41494","imported":"2026-08-07T19:55:05.564Z"}]},"references":[{"type":"WEB","url":"https://curl.se/docs/CVE-2026-9546.html"},{"type":"WEB","url":"https://curl.se/docs/CVE-2026-9546.json"},{"type":"WEB","url":"https://github.com/advisories/GHSA-25rx-86v8-32c6"},{"type":"WEB","url":"https://hackerone.com/reports/3754343"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-9546"}],"affected":[{"package":{"name":"CURL_jll","ecosystem":"Julia","purl":"pkg:julia/CURL_jll?uuid=b21e61f3-bafc-59ac-ab14-4c5c62d6588d"},"ranges":[{"type":"SEMVER","events":[{"introduced":"8.20.0+0"},{"fixed":"8.21.0+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1221.json"}},{"package":{"name":"LibCURL_jll","ecosystem":"Julia","purl":"pkg:julia/LibCURL_jll?uuid=deac9b47-8bc7-5906-a0fe-35ac56dc84c0"},"ranges":[{"type":"SEMVER","events":[{"introduced":"8.18.0+0"},{"fixed":"8.21.0+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1221.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}