Unrated severityNVD Advisory· Published Jun 19, 2026· Updated Jun 19, 2026
Apache APISIX: JWT Algorithm Confusion allows authentication bypass
CVE-2026-39999
Description
Authentication Bypass by Spoofing vulnerability in Apache APISIX.
The attacker can completely bypass authentication capitalising on certain configurations of jwt-auth plugin. This issue affects Apache APISIX: from v2.2 through v3.16.0.
Users are recommended to upgrade to version v3.17.0, which fixes the issue.
Affected products
2Patches
Vulnerability mechanics
References
1- lists.apache.org/thread/nfopt8cnxd3k0rs1oxtr7lzxrdw4mojqmitrevendor-advisory
News mentions
1- Apache APISIX: 12 CVEs Disclosed Across Nine Auth Plugins, All Fixed in 3.17.0Vypr Intelligence · Jun 19, 2026