🛡️ CVE-2026-11311 — nginx-gateway-fabric

🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-76 OSV
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

NGINX Gateway Fabric vulnerability

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability none.

Weakness class

CVE-2026-11311 is classified as CWE-76: Improper Neutralization of Equivalent Special Elements. The product correctly neutralizes certain special elements, but it improperly neutralizes equivalent special elements.

Affected software

CVE-2026-11311 is recorded against 1 package.

  • nginx-gateway-fabric

Timeline and source

Published on 24 June 2026 and last revised on 2 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

my.f5.com (Web)
nvd.nist.gov (Web)

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CWE CWE-76
Public Exploit ✅ No
Source OSV
Published 2026-06-24
Updated 2026-08-12
Modified 2026-07-02
Fix URL N/A

Affected Packages

Software From version Fixed in
nginx-gateway-fabric — —

Similar Threats

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