High 7.0Published Jun 19, 2026

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

Updated under an hour ago (Oct 26, 2026, 4:30 AM ET)

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It affects Apache Software Foundation Apache APISIX and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Apache Software Foundation Apache APISIX

Exploited in the last 30 days

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: 7.0 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-290
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: apache
NVD analysis: Analyzed
Record last updated: Jun 22, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Apache Software Foundation Apache APISIX apache_software_foundation:apache_apisix (from the name)	from 2.2 through 3.16.0	CNA record
apache apisix apache:apisix	from 2.2 before 3.17.0	NVD

References

https://lists.apache.org/thread/nfopt8cnxd3k0rs1oxtr7lzxrdw4mojqvendor-advisory, mailing-list
http://www.openwall.com/lists/oss-security/2026/06/19/5third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.