CVE-2026-74848
Received Received - Intake

HTTP Request Smuggling in Apache APISIX

Publication date: 2026-08-27

Last updated on: 2026-08-27

Assigner: Apache Software Foundation

Description
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in Apache APISIX. An attacker could make other clients receive attacker-chosen or other users' responses on serverless-plugin routes. This issue affects Apache APISIX: from 2.12.0 through 3.17.0. Users are recommended to upgrade to version 3.18.0, which fixes the issue.

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Meta Information

Published
2026-08-27
Last Modified
2026-08-27
Generated
2026-08-27
AI Q&A
2026-08-27
EPSS Evaluated
N/A
NVD
CVE-2026-74848
EUVD
EUVD-2026-66958

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
apache apisix From 2.12.0 (inc) to 3.17.0 (inc)
apache apisix 3.18.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-444 The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.

Attack-Flow Graph

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Executive Summary

This is an HTTP Request/Response Smuggling vulnerability in Apache APISIX versions 2.12.0 through 3.17.0. It allows an attacker to manipulate responses so that other clients or users receive incorrect or attacker-chosen responses on serverless-plugin routes.

Impact Analysis

An attacker could intercept or alter responses meant for other users, leading to data leaks, session hijacking, or misinformation. This affects confidentiality and integrity of user interactions with the API.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating GDPR (data protection) and HIPAA (health information privacy) requirements. Compliance may be compromised due to potential data breaches and lack of proper access controls.

Mitigation Strategies

Upgrade Apache APISIX to version 3.18.0 or later to fix the HTTP Request Smuggling vulnerability affecting versions 2.12.0 through 3.17.0.

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