BIT-nginx-gateway-fabric-2026-91184
See a problem?- Import Source
- https://github.com/bitnami/vulndb/tree/main/data/nginx-gateway-fabric/BIT-nginx-gateway-fabric-2026-91184.json
- JSON Data
- https://api.osv.dev/v1/vulns/BIT-nginx-gateway-fabric-2026-91184
- Aliases
-
- CVE-2026-91184
- Published
- 2026-10-21T08:53:28Z
- Modified
- 2026-10-21T12:00:40Z
- Summary
- NGINX Gateway Fabric vulnerability
- Details
-
Description
NGINX Gateway Fabric has a vulnerability when it renders the spec.basic.realm (and spec.jwt.realm) field of a namespaced AuthenticationFilter verbatim, unescaped and unvalidated, into the shared data-plane nginx.conf as auth_basic "";. A namespaced authenticated attacker that configures AuthenticationFilter CRD to an HTTPRoute/GRPCRoute on a shared Gateway can craft a realm value that closes the quoted directive and the enclosing location {} block and injects arbitrary NGINX directives into that Gateway's data-plane config.
Impact
A remote authenticated attacker can send crafted requests to configure NGINX Gateway Fabric AuthenticationFilter CRD and may be able to read every co-located tenant's mounted secrets, SSRF via proxy_pass, reading the pod ServiceAccount token, or hijacking other tenants' routes. There is no data plane exposure; this is a control plane issue only.
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
- Database specific
{ "cpes": [ "cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:*" ], "severity": "High" }- References
Affected packages
Bitnami / nginx-gateway-fabric
Package
- Name
- nginx-gateway-fabric
- Purl
- pkg:bitnami/nginx-gateway-fabric
Severity
- 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/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 CVSS Calculator