Apache APISIX 2.12.0-3.17.0 HTTP Request/Response Smuggling Vulnerability
CVE-2026-74848 Published on August 27, 2026
Apache APISIX: Cross-user response poisoning in serverless plugins
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.
Vulnerability Analysis
CVE-2026-74848 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a HTTP Request Smuggling Vulnerability?
When malformed or abnormal HTTP requests are interpreted by one or more entities in the data flow between the user and the web server, such as a proxy or firewall, they can be interpreted inconsistently, allowing the attacker to "smuggle" a request to one device without the other device being aware of it.
CVE-2026-74848 has been classified to as a HTTP Request Smuggling vulnerability or weakness.
Products Associated with CVE-2026-74848
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Affected Versions
Apache Software Foundation Apache APISIX:- Version 2.12.0, <= 3.17.0 is affected.