CVE-2026-39999
Last modified
CVE-2026-39999 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. 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.. EPSS estimates a 0.39% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apache | Apisix | >= 2.2, < 3.17.0 |
References
- https://lists.apache.org/thread/nfopt8cnxd3k0rs1oxtr7lzxrdw4mojqVendor Advisory, Mailing List
- http://www.openwall.com/lists/oss-security/2026/06/19/5Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-39999?
How severe is CVE-2026-39999?
How do I fix CVE-2026-39999?
How Strix Helps
- Same Subject, Wrong User: A Cross-Issuer Account Takeover in n8nStrix found an identity-binding bug in n8n's token-exchange flow enabling account takeover.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-39983basic-ftp is an FTP client for Node.js. Prior to 5.2.1, basi…8.6
- CVE-2026-39984Sigstore Timestamp Authority is a service for issuing RFC 31…5.5
- CVE-2026-39985LORIS (Longitudinal Online Research and Imaging System) is a…6.1
- CVE-2026-39987marimo is a reactive Python notebook. Prior to 0.23.0, Marim…9.8
- CVE-2026-3999A broken access control may allow an authenticated user to p…8.8
- CVE-2026-39998Improper Input Validation vulnerability in Apache APISIX. T…8.8
- CVE-2026-40000The Activity zte.com.cn.filer/zte.com.cn.filer.FilePreViewAc…1.8
- CVE-2026-40001There is a local privilege escalation vulnerability in the Z…5.2
- CVE-2026-40002Red Magic 11 Pro (NX809J) contains a vulnerability that allo…8.8
- CVE-2026-40003ZTE ZX297520V3 BootROM contains a vulnerability that allows …6.8
- CVE-2026-40004There exists an openssl.cnf privilege escalation vulnerabili…7.8
- CVE-2026-40005Improper Limitation of a Pathname to a Restricted Directory …9.1
Are you affected by CVE-2026-39999?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST