{"id":"CVE-2026-39999","summary":"Apache APISIX: JWT Algorithm Confusion allows authentication bypass","details":"Authentication Bypass by Spoofing vulnerability in Apache APISIX.\n\nThe attacker can completely bypass authentication capitalising on certain configurations of jwt-auth plugin.\nThis issue affects Apache APISIX: from v2.2 through v3.16.0.\n\nUsers are recommended to upgrade to version v3.17.0, which fixes the issue.","aliases":["BIT-apisix-2026-39999"],"modified":"2026-07-08T08:09:29.189856212Z","published":"2026-06-19T13:07:50.893Z","database_specific":{"cna_assigner":"apache","cwe_ids":["CWE-290"],"unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"2.2"},{"last_affected":"3.16.0"}]},{"source":"DESCRIPTION","extracted_events":[{"introduced":"v2.2"},{"fixed":"v3.16.0"}]}],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39999.json"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/06/19/5"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39999.json"},{"type":"ADVISORY","url":"https://lists.apache.org/thread/nfopt8cnxd3k0rs1oxtr7lzxrdw4mojq"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39999"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/apache/apisix","events":[{"introduced":"e8dcf3793ca40b30047406ac51a79a500356f67b"},{"fixed":"9ef2ecab67f652d38365049613610ef649bb4ad0"}],"database_specific":{"extracted_events":[{"introduced":"2.2"},{"fixed":"3.17.0"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:apache:apisix:*:*:*:*:*:*:*:*"}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-39999.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N"}]}