CVE-2026-74848: apache software foundation apache apisix HTTP Request/Response Smuggling

Vulnerability summary

CVE-2026-74848 is a high (CVSS 7.5) HTTP Request/Response Smuggling vulnerability in apache software foundation apache apisix. EPSS estimates a 0.59% chance of exploitation in the next 30 days, higher than 47.3% of scored vulnerabilities.

Timeline

1. 27-08-2026
   PublishedVulnerability first disclosed.
2. 27-08-2026
   Last modifiedVulnerability information updated.

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.

• CWE-444Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')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.