CVE-2026-31908
Received Received - Intake
Header Injection in Apache APISIX Forward-Auth Plugin Allows Malicious Requests

Publication date: 2026-04-14

Last updated on: 2026-04-17

Assigner: Apache Software Foundation

Description
Header injection vulnerability in Apache APISIX. The attacker can take advantage of certain configuration in forward-auth plugin to inject malicious headers. This issue affects Apache APISIX: from 2.12.0 through 3.15.0. Users are recommended to upgrade to version 3.16.0, which fixes the issue.
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Meta Information
Published
2026-04-14
Last Modified
2026-04-17
Generated
2026-06-16
AI Q&A
2026-04-14
EPSS Evaluated
2026-06-15
NVD
CVE-2026-31908
EUVD
EUVD-2026-22225
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
apache apisix From 2.12.0 (inc) to 3.16.0 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-75 The product does not adequately filter user-controlled input for special elements with control implications.
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Executive Summary

CVE-2026-31908 is a header injection vulnerability found in the Apache APISIX forward-auth plugin. This flaw affects versions from 2.12.0 through 3.15.0. An attacker can exploit certain configurations in the forward-auth plugin to inject malicious HTTP headers into requests.

Impact Analysis

This vulnerability allows an attacker to manipulate HTTP request headers by injecting malicious headers. Such manipulation can lead to security risks including unauthorized access or tampering with requests, potentially compromising the integrity and security of the affected system.

Mitigation Strategies

To mitigate the header injection vulnerability in Apache APISIX's forward-auth plugin, users are recommended to upgrade their Apache APISIX installation to version 3.16.0 or later, as this version contains the fix for the issue.

Compliance Impact

The provided information does not specify how the header injection vulnerability in Apache APISIX affects compliance with common standards and regulations such as GDPR or HIPAA.

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