APISIX 2.12-3.16 Improper Input Validation in forward-auth Plugin
CVE-2026-39998 Published on June 19, 2026
Apache APISIX: Identity Injection via forward-auth Plugin Missing Header Cleanup
Improper Input Validation vulnerability in Apache APISIX.
The attacker can take advantage of certain configuration in forward-auth plugin to spoof identity headers.
This issue affects Apache APISIX: from 2.12.0 through 3.16.0.
Users are recommended to upgrade to version 3.17.0, which fixes the issue.
Weakness Type
Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
Products Associated with CVE-2026-39998
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Affected Versions
Apache Software Foundation Apache APISIX:- Version 2.12.0, <= 3.16.0 is affected.