{"id":"JLSEC-2026-1222","summary":"When a libcurl-based application performs transfers via `SCP://` or `SFTP://` and utilizes the ...","details":"When a libcurl-based application performs transfers via `SCP://` or `SFTP://`\nand utilizes the `CURLOPT_SSH_KEYFUNCTION` callback, it may silently accept an\nuntrusted server. This vulnerability occurs when a server presents a host key\ntype that does not match the specific key type already recorded for that host\nin the `known_hosts` file. Instead of rejecting the mismatch, the callback\nmechanism fails to properly enforce the restriction, allowing the connection\nto succeed without warning and risking a potential man-in-the-middle attack.","modified":"2026-08-07T20:29:07.135848087Z","published":"2026-08-07T20:11:58.984Z","upstream":["CVE-2026-9547","EUVD-2026-41495","GHSA-xq9p-gxg6-f7q6"],"database_specific":{"sources":[{"imported":"2026-08-07T19:54:39.020Z","modified":"2026-07-07T14:52:29.503Z","published":"2026-07-03T07:16:25.990Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-9547","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-9547","database_specific":{"status":"Analyzed"},"id":"CVE-2026-9547"},{"modified":"2026-07-06T18:30:52Z","published":"2026-07-03T09:31:27Z","url":"https://api.github.com/advisories/GHSA-xq9p-gxg6-f7q6","html_url":"https://github.com/advisories/GHSA-xq9p-gxg6-f7q6","id":"GHSA-xq9p-gxg6-f7q6","imported":"2026-08-07T19:56:01.762Z"},{"html_url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-41495","id":"EUVD-2026-41495","imported":"2026-08-07T19:55:07.047Z","modified":"2026-07-06T16:48:14Z","published":"2026-07-03T06:18:44Z","url":"https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-41495"}],"license":"CC-BY-4.0"},"references":[{"type":"WEB","url":"https://curl.se/docs/CVE-2026-9547.html"},{"type":"WEB","url":"https://curl.se/docs/CVE-2026-9547.json"},{"type":"WEB","url":"https://github.com/advisories/GHSA-xq9p-gxg6-f7q6"},{"type":"WEB","url":"https://hackerone.com/reports/3751712"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-9547"}],"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":"8.21.0+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1222.json"}},{"package":{"name":"LibCURL_jll","ecosystem":"Julia","purl":"pkg:julia/LibCURL_jll?uuid=deac9b47-8bc7-5906-a0fe-35ac56dc84c0"},"ranges":[{"type":"SEMVER","events":[{"introduced":"7.70.0+0"},{"fixed":"8.21.0+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1222.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"}]}