{"id":"JLSEC-2026-1212","summary":"libcurl might in some circumstances reuse the wrong connection when asked to do Negotiate...","details":"libcurl might in some circumstances reuse the wrong connection when asked to\ndo Negotiate-authenticated ones, even when they are set to use different\n'services'.\n\nlibcurl features a pool of recent connections so that subsequent requests can\nreuse an existing connection to avoid overhead.\n\nWhen reusing a connection a range of criteria must be met. Due to a logical\nerror in the code, a request that was issued by an application could\nwrongfully reuse an existing connection to the same server that was\nauthenticated using different services.","modified":"2026-08-07T20:29:07.711109089Z","published":"2026-08-07T20:11:58.984Z","upstream":["CVE-2026-8458","EUVD-2026-41504","GHSA-88c6-6jfq-mm4q"],"database_specific":{"license":"CC-BY-4.0","sources":[{"modified":"2026-07-07T23:12:17.003Z","published":"2026-07-03T07:16:24.630Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-8458","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-8458","database_specific":{"status":"Analyzed"},"id":"CVE-2026-8458","imported":"2026-08-07T19:54:38.863Z"},{"html_url":"https://github.com/advisories/GHSA-88c6-6jfq-mm4q","id":"GHSA-88c6-6jfq-mm4q","imported":"2026-08-07T19:56:07.773Z","modified":"2026-07-06T18:30:48Z","published":"2026-07-03T09:31:26Z","url":"https://api.github.com/advisories/GHSA-88c6-6jfq-mm4q"},{"imported":"2026-08-07T19:54:56.135Z","modified":"2026-07-06T17:32:06Z","published":"2026-07-03T06:14:42Z","url":"https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-41504","html_url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-41504","id":"EUVD-2026-41504"}]},"references":[{"type":"WEB","url":"https://curl.se/docs/CVE-2026-8458.html"},{"type":"WEB","url":"https://curl.se/docs/CVE-2026-8458.json"},{"type":"WEB","url":"https://github.com/advisories/GHSA-88c6-6jfq-mm4q"},{"type":"WEB","url":"https://hackerone.com/reports/3721183"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-8458"}],"affected":[{"package":{"name":"CURL_jll","ecosystem":"Julia","purl":"pkg:julia/CURL_jll?uuid=b21e61f3-bafc-59ac-ab14-4c5c62d6588d"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"8.20.0+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1212.json"}},{"package":{"name":"LibCURL_jll","ecosystem":"Julia","purl":"pkg:julia/LibCURL_jll?uuid=deac9b47-8bc7-5906-a0fe-35ac56dc84c0"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"8.20.0+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1212.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"}]}