{"id":"CVE-2026-39998","summary":"Apache APISIX: Identity Injection via forward-auth Plugin Missing Header Cleanup","details":"Improper Input Validation vulnerability in Apache APISIX.\n\nThe attacker can take advantage of certain configuration in forward-auth plugin to spoof identity headers.\nThis issue affects Apache APISIX: from 2.12.0 through 3.16.0.\n\nUsers are recommended to upgrade to version 3.17.0, which fixes the issue.","aliases":["BIT-apisix-2026-39998"],"modified":"2026-07-08T08:13:08.085811043Z","published":"2026-06-19T13:04:39.608Z","database_specific":{"cna_assigner":"apache","cwe_ids":["CWE-20"],"unresolved_ranges":[{"extracted_events":[{"introduced":"2.12.0"},{"last_affected":"3.16.0"}],"source":"AFFECTED_FIELD"},{"extracted_events":[{"introduced":"2.12.0"},{"fixed":"3.16.0"}],"source":"DESCRIPTION"}],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39998.json"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/06/19/4"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39998.json"},{"type":"ADVISORY","url":"https://lists.apache.org/thread/vgkvy396010d7g6m0jrn4d3hjf2svlvv"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39998"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/apache/apisix","events":[{"introduced":"6193a307d1842b25456aa3e42a33674a724fb427"},{"fixed":"9ef2ecab67f652d38365049613610ef649bb4ad0"}],"database_specific":{"cpe":"cpe:2.3:a:apache:apisix:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"2.12.0"},{"fixed":"3.17.0"}],"source":"CPE_RANGE"}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-39998.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H"}]}