CVE-2026-39999

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.

Score

CVSS 3.1 9.1 Critical

Status

Analyzed - security@apache.org

Published

2026-06-19

Last modified

2026-10-25

Weaknesses

CWE-290

Affected products

• Apisix (Apache)
• Apache Apisix (Apache Software Foundation)

References

• https://lists.apache.org/thread/nfopt8cnxd3k0rs1oxtr7lzxrdw4mojq
• http://www.openwall.com/lists/oss-security/2026/06/19/5