CVE-2026-39999 — CRITICAL (9.1)

Q: How severe is CVE-2026-39999?

CVE-2026-39999 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.

Q: Is there a patch for CVE-2026-39999?

Check the references section above for vendor advisories and patch information. Affected products include: Apache Apisix.

Vulnerability 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.

CVSS Score

9.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

NONE

Affected Products

Vendor	Product	Versions
Apache	Apisix	>= 2.2, < 3.17.0

Related Weaknesses (CWE)

CWE-290

References

https://lists.apache.org/thread/nfopt8cnxd3k0rs1oxtr7lzxrdw4mojqVendor AdvisoryMailing List
http://www.openwall.com/lists/oss-security/2026/06/19/5Third Party Advisory

FAQ

What is CVE-2026-39999?

CVE-2026-39999 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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 Apach...

How severe is CVE-2026-39999?

CVE-2026-39999 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-39999?

Check the references section above for vendor advisories and patch information. Affected products include: Apache Apisix.