CVE-2026-39999
Apache APISIX: JWT Algorithm Confusion allows authentication bypass
- State
- Published
- Severity
- 7.0 High
- Published
- Jun 19, 2026
- Updated
- Jun 22, 2026
- Reserved
- Apr 8, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.0 High | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N | apache |
Weaknesses
- CWE-290 Authentication Bypass by Spoofing
Affected Products
| Product | Versions |
|---|---|
Apache APISIXApache Software Foundation |
|
References
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