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High · 7.0 CVE-2026-39999 EUVD-2026-38013GHSA-pw26-hvcp-w6vj

Apache APISIX: JWT Algorithm Confusion allows authentication bypass

Published Jun 19, 2026 · Updated Jun 22, 2026 · Assigned by apache

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

VendorProductAffectedFixed
Apache Software Foundation Apache APISIX 2.2 – ≤ 3.16.0 —

References