CVE-2026-124666
Received Received - Intake

Authentication Bypass via Spoofed Headers in Apache APISIX

Publication date: 2026-11-13

Last updated on: 2026-11-13

Assigner: Apache Software Foundation

Description
Authentication bypass by spoofing vulnerability in Apache APISIX. On a route where multi-auth falls back from wolf-rbac to another successful authenticator, client-supplied Wolf identity headers can remain in the request. A downstream service that relies on those documented headers may therefore receive an identity that was not established by the successful authenticator. This issue affects Apache APISIX: from 3.8.0 through 3.19.0. Users are recommended to upgrade to version 3.20.0, which fixes the issue.

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Meta Information

Published
2026-11-13
Last Modified
2026-11-13
Generated
2026-11-13
AI Q&A
2026-11-13
EPSS Evaluated
N/A
NVD
CVE-2026-124666
EUVD
EUVD-2026-125679

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Apache Software Foundation Apache APISIX From 3.8.0 (inc) to 3.19.0 (inc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-290 This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.

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Executive Summary

This vulnerability is an authentication bypass by spoofing in Apache APISIX. It occurs when multi-auth falls back from wolf-rbac to another authenticator. Client-supplied Wolf identity headers may remain in the request, causing a downstream service to receive an incorrect identity not established by the successful authenticator.

Impact Analysis

An attacker could exploit this to bypass authentication and impersonate legitimate users. This may lead to unauthorized access to sensitive data or services, depending on the downstream service's reliance on the spoofed headers.

Compliance Impact

This vulnerability could violate compliance requirements by allowing unauthorized access to protected data. GDPR and HIPAA mandate strict access controls and authentication, which this flaw undermines. Organizations may face penalties for non-compliance if exploited.

Mitigation Strategies

Upgrade Apache APISIX to version 3.20.0 or later to address the authentication bypass issue.

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