{"id":"JLSEC-2025-30","summary":"An authentication bypass vulnerability exists libcurl \u003c8.0.0 in the connection reuse feature which...","details":"An authentication bypass vulnerability exists libcurl \u003c8.0.0 in the connection reuse feature which can reuse previously established connections with incorrect user permissions due to a failure to check for changes in the `CURLOPT_GSSAPI_DELEGATION` option. This vulnerability affects krb5/kerberos/negotiate/GSSAPI transfers and could potentially result in unauthorized access to sensitive information. The safest option is to not reuse connections if the `CURLOPT_GSSAPI_DELEGATION` option has been changed.","modified":"2026-07-25T18:24:08.294914518Z","published":"2025-10-10T15:04:01.319Z","upstream":["CVE-2023-27536"],"database_specific":{"license":"CC-BY-4.0","sources":[{"imported":"2026-07-17T20:57:14.528Z","modified":"2026-06-17T05:45:25.680Z","published":"2023-03-30T20:15:07.547Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2023-27536","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2023-27536","database_specific":{"status":"Modified"},"id":"CVE-2023-27536"}]},"references":[{"type":"WEB","url":"https://hackerone.com/reports/1895135"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2023/04/msg00025.html"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/"},{"type":"WEB","url":"https://security.gentoo.org/glsa/202310-12"},{"type":"WEB","url":"https://security.netapp.com/advisory/ntap-20230420-0010/"}],"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":"8.5.0+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2025/JLSEC-2025-30.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":"8.0.1+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2025/JLSEC-2025-30.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}