CVE-2026-39999

Critical

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.

SeverityCritical

CVSS9.1

Exploit probability—

Product

Apache Apisix

PublishedJun 19, 2026

First seenJun 19, 2026

Weakness typeCWE-290CWE-290

How to fix

Update

apache apisix3.17.0 or later

Vendor advisories

lists.apache.org/thread/nfopt8cnxd3k0rs1oxtr7lzxrdw4mojq

Affected products

Product	Affected versions	Fixed in
apache apisix	2.2 ≤ v < 3.17.0	3.17.0

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