CVE-2026-11311

CVE Enrichment

CVSS: 8.6 HIGH
EPSS: 0.57%
EPSS Percentile: 47.03%
CISA KEV: Not listed

Description

When NGINX Plus is configured as the data plane for NGINX Gateway Fabric, an injection vulnerability exists in the NGINX configuration generator component of NGINX Gateway Fabric. User-supplied string values from the NginxProxy Custom Resource Definition serverTokens field and the AuthenticationFilter Custom Resource Definition extraAuthArgs field are rendered directly into NGINX configuration templates without sanitization or escaping. An authenticated attacker with permission to create or modify these Custom Resource Definitions may craft values that inject arbitrary NGINX configuration directives. This is a control plane issue; there is no data plane exposure from the vulnerability trigger itself. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Technical Details

CVSS Version: 4.0
CNA / NVD Source: [email protected]
Published: 17-Jun-2026 22:16
Last Modified: 26-Oct-2026 06:10
EPSS Date: 2026-10-30
CWE: CWE-76, CWE-74

CVSS Vector


            CVSS:4.0                            AV:N /
                            AC:L /
                            AT:N /
                            PR:L /
                            UI:N /
                            VC:H /
                            VI:H /
                            VA:N /
                            SC:N /
                            SI:N /
                            SA:N /
                            E:X /
                            CR:X /
                            IR:X /
                            AR:X /
                            MAV:X /
                            MAC:X /
                            MAT:X /
                            MPR:X /
                            MUI:X /
                            MVC:X /
                            MVI:X /
                            MVA:X /
                            MSC:X /
                            MSI:X /
                            MSA:X /
                            S:X /
                            AU:X /
                            R:X /
                            V:X /
                            RE:X /
                            U:X

Affected Products / Versions

f5 / nginx_gateway_fabric Source: NVD CPE · affected
Version / affected range: * · from (inclusive) 2.5.0 · before (exclusive) 2.6.4
cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:*

References

[email protected]

Last enrichment sync: 31-Oct-2026 01:04
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

#NGINX F5 Issues Out-of-Band Patches for Critical NGINX Vulnerabilities

CVE (3)

MITRE ATT&CK (1)

Vendors (1)

Products (5)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.