CVE-2026-74848

EUVD-2026-66958
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.
HTTP Request/Response Smuggling
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
apacheCNA
7 HIGH
NETWORK
LOW
NONE
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 39.72%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
apacheapisix
2.12.0 ≤
𝑥
≤ 3.17.0
CNA
Common Weakness Enumeration
References
https://lists.apache.org/thread/xdgpszmw8dw4wvmfxy043d83m150kx3n
http://www.openwall.com/lists/oss-security/2026/08/26/12