Apache APISIX: JWT Algorithm Confusion allows authentication bypass_CVE-2026-39999

7 / 10

HIGH

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

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.

Basic Information

ID CVE-2026-39999

Source apache

Published Jun 19, 2026 at 13:07

Affected Product

Vendor Apache Software Foundation

Product Apache APISIX

Version 2.2

Affected Versions Apache Software Foundation Apache APISIX 2.2

CWE Classification

CWE-290

References

lists.apache.org /thread/nfopt8cnxd3k0rs1oxtr7lzxrdw4mojq

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    "published": "2026-06-19T13:07:50.893Z",
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