High severity · published Aug 27, 2026
CVE-2026-74848
Apache APISIX: Cross-user response poisoning in serverless plugins
7.5
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 48% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AA
Apache APISIX · Apache Software Foundation
2.12.0 through 3.17.0 · source: vendor
AP
Apisix · Apache
2.12.0 before 3.18.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-74848
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-74848
Mailing List
https://lists.apache.org/thread/xdgpszmw8dw4wvmfxy043d83m150kx3n
Mailing List
http://www.openwall.com/lists/oss-security/2026/08/26/12
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