High 8.8Published Jun 19, 2026

CVE-2026-39998Improper Input Validation vulnerability in Apache APISIX.

Updated under an hour ago (2026-10-19 06:30 UTC)

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It affects apache apisix. 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 apisix

Exploited in the last 30 days

Improper Input Validation vulnerability in Apache APISIX. The attacker can take advantage of certain configuration in forward-auth plugin to spoof identity headers. This issue affects Apache APISIX: from 2.12.0 through 3.16.0. Users are recommended to upgrade to version 3.17.0, which fixes the issue.

CVSS: 8.8 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-20
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jun 23, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

apache apisix apache:apisix	from 2.12.0 before 3.17.0	NVD

References

https://lists.apache.org/thread/vgkvy396010d7g6m0jrn4d3hjf2svlvvvendor-advisory, mailing-list
http://www.openwall.com/lists/oss-security/2026/06/19/4third-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.