{"id":"CVE-2023-27536","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.","aliases":["CURL-CVE-2023-27536"],"modified":"2026-09-10T03:45:57.073249202Z","published":"2023-03-30T00:00:00Z","related":["ALSA-2023:4523","ALSA-2023:6679","SUSE-SU-2023:0865-1","SUSE-SU-2023:1582-1","SUSE-SU-2023:1711-1","SUSE-SU-2023:2226-1","SUSE-SU-2023:2228-1","openSUSE-SU-2024:12812-1"],"database_specific":{"cwe_ids":["CWE-305"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/27xxx/CVE-2023-27536.json","unresolved_ranges":[{"extracted_events":[{"introduced":"Fixed in 8.0.0"},{"last_affected":"Fixed in 8.0.0"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"hackerone"},"references":[{"type":"WEB","url":"https://hackerone.com/reports/1895135"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/27xxx/CVE-2023-27536.json"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-27536"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202310-12"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20230420-0010/"},{"type":"ARTICLE","url":"https://lists.debian.org/debian-lts-announce/2023/04/msg00025.html"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/curl/curl","events":[{"introduced":"64c613c27abb58503eb8a966bee1489562060da0"},{"last_affected":"b3d2310c6441c075cdad12155da944886f1974a6"}],"database_specific":{"cpe":"cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"7.22.0"},{"last_affected":"7.88.1"}],"source":"CPE_RANGE"}}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-27536.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}