Apache APISIX 3.16.0: JWTAuth Authentication Bypass via Spoofing
CVE-2026-39999 Published on June 19, 2026
Apache APISIX: JWT Algorithm Confusion allows authentication bypass
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.
Weakness Type
Authentication Bypass by Spoofing
This attack-focused weakness is caused by improperly implemented authentication schemes that are subject to spoofing attacks.
Products Associated with CVE-2026-39999
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Affected Versions
Apache Software Foundation Apache APISIX:- Version 2.2, <= 3.16.0 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.