CVE-2026-74848: Apache APISIX: Cross-user response poisoning in serverless plugins

[Abhishek Choudhary <shreemaanabhishek () apache org>]

Severity: 

Affected versions:

- Apache APISIX 2.12.0 through 3.17.0

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.

Credit:

Xclow3n (Rajat Raghav) (reporter)

References:

https://apisix.apache.org
https://www.cve.org/CVERecord?id=CVE-2026-74848