CVE-2026-39999 — Apache APISIX: JWT Algorithm Confusion allows authentication bypass

CVE-2026-39999

Apache APISIX: JWT Algorithm Confusion allows authentication bypass PUBLISHED

Description (CNA)

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 (CNA)

Vendor / product	Versions
Apache Software Foundation / Apache APISIX	affected 2.2 through 3.16.0

CWE

CWE-290

References

https://lists.apache.org/thread/nfopt8cnxd3k0rs1oxtr7lzxrdw4mojq

ADP enrichment

CVE

No English description supplied.

http://www.openwall.com/lists/oss-security/2026/06/19/5

CISA-ADP

No English description supplied.

No references supplied.