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TI-2026-09769 Aliases CVE-2026-11311GHSA-9566-3h6w-56pp

NGINX Gateway Fabric vulnerability

Priority MEDIUM 40CWE-76Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00567 47th percentileScored 2026-11-07
Fix Fixed NGINX Gateway Fabric (F5): 2.6.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
F5NGINX Gateway Fabric2.5.0 to before 2.6.42.6.4Patch availableCNA
  • NGINX Gateway Fabric VendorF5 Affected 2.5.0 to before 2.6.4 Fixed in 2.6.4 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:*2.5.0 to before 2.6.4VulnerableF5
  • cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:* Versions 2.5.0 to before 2.6.4 Vulnerable ·F5

Remediation

  • Fix · CNA NGINX Gateway Fabric (F5) Fixed in 2.6.4

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    F5 NGINX Gateway Fabric 2.6.4

    3 records Highest priority Priority MEDIUM 2 MEDIUM, 1 LOW

    Other records, highest priority first

    Show all 3 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-11311
  2. 2026-10-03 Alias added: GHSA-9566-3h6w-56pp

References

Advisory 1

  • TI-2026-31136 NGINX ngx_http_rewrite_module vulnerability CVSS 4.0CRITICAL 9.2
  • TI-2026-30813 NGINX Map directive and Regex matching vulnerability CVSS 4.0CRITICAL 9.2
  • TI-2026-08132 NGINX ngx_http_rewrite_module vulnerability CVSS 4.0CRITICAL 9.2
  • TI-2026-30812 NGINX Open-Source ngx_http_v3_module vulnerability CVSS 4.0CRITICAL 9.2
  • TI-2026-30432 NGINX ngx_http_proxy_v2_module and ngx_http_grpc_module vulnerability CVSS 4.0CRITICAL 9.2
  • TI-2026-42786 NGINX ngx_http_slice_module vulnerability CVSS 4.0HIGH 8.8
See all 17 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences