CVE-2026-39998

HIGH

Apache APISIX: Identity Injection via forward-auth Plugin Missing Header Cleanup

Title source: cna
STIX 2.1

Description

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.

References (2)

Core 2

Scores

CVSS v3 8.8
EPSS 0.0040
EPSS Percentile 32.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-20
Status published
Products (2)
apache/apisix 2.12.0 - 3.17.0
Apache Software Foundation/Apache APISIX 2.12.0 - 3.16.0
Published Jun 19, 2026
Tracked Since Jun 19, 2026