# Snippets add\_header doesn't work with all applications **URL:** \ **Category:** NGINX Ingress Controller\ **Tags:** config, web-server\ **Created:** [February 13, 2026, 6:45pm UTC](https://community.nginx.org/t/snippets-add-header-doesnt-work-with-all-applications/9034 "2026-02-13T18:45:10Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![VictorCisternas](https://drob5swvtjqxg.cloudfront.net/user_avatar/community.nginx.org/victorcisternas/32/4146_2.png) [@VictorCisternas](https://community.nginx.org/u/VictorCisternas)\ **Post date:** [February 13, 2026, 6:45pm UTC](https://community.nginx.org/t/snippets-add-header-doesnt-work-with-all-applications/9034/1 "2026-02-13T18:45:10Z")
**My issue:** The snippets “add\_header“ doesn’t show/works with all ingress applications **How I encountered the problem:** I’m installing NGINX Ingress Controller Community as an alternative to Ingress-Nginx, I’m testing Ingress annotations and needed to add a header for example to enable CORS u other value. **Solutions I’ve tried:** - Trying with annotations “[nginx.org/server-snippets”](http://nginx.org/server-snippets%E2%80%9D) or “[nginx.org/location-snippets”](http://nginx.org/location-snippets%E2%80%9D). - Copying the success case and the error case from the same Ingress base. - Install from other chart version 2.4.0 **Version of NIC and/or NGINX:** helm chart nginx-ingress-2.4.3, app version 5.3.3 and kubernetes 1.34.2 **Deployment environment:** Install with helm: ```auto helm install nginx-ingress oci://ghcr.io/nginx/charts/nginx-ingress \ --version 2.4.3 \ --set controller.service.type=NodePort \ --set controller.service.externalTrafficPolicy=Local \ --set controller.hostNetwork=true \ --set controller.kind=daemonset \ --set controller.enableCustomResources=true \ --set controller.wildcardTLS.secret=default/my-ssl \ --set controller.defaultTLS.secret=default/my-ssl \ --set controller.enableSnippets=true ``` 1 ) Success case Ingress ```auto apiVersion: networking.k8s.io/v1 kind: Ingress metadata: annotations: nginx.org/server-snippets: | add_header my-test-header test-value; name: nginx-prod namespace: default spec: ingressClassName: nginx rules: - host: nginx-prod.mysite.com http: paths: - backend: service: name: nginx-prod port: number: 8080 path: / pathType: ImplementationSpecific tls: - hosts: - nginx-prod.mysite.com secretName: my-ssl ``` Example curl ```auto curl https://nginx-prod.mysite.com --head HTTP/1.1 200 OK Server: nginx Date: Fri, 13 Feb 2026 18:18:30 GMT Content-Type: text/html Content-Length: 615 Connection: keep-alive Last-Modified: Wed, 04 Feb 2026 15:12:20 GMT ETag: "698361d4-267" Accept-Ranges: bytes my-test-header: test-value --> Correct ``` 1. Error case ```auto apiVersion: networking.k8s.io/v1 kind: Ingress metadata: annotations: annotations-risk-level: Critical nginx.org/location-snippets: | add_header my-test-header test-value; name: app1 namespace: default spec: ingressClassName: nginx rules: - host: app1.mysite.com http: paths: - backend: service: name: app1 port: number: 3000 path: / pathType: ImplementationSpecific tls: - hosts: - app1.mysite.com secretName: my-ssl ``` Example curl ```auto curl https://app1.mysite.com --head HTTP/1.1 404 Not Found -> Real reply from my app1 because need more data Server: nginx Date: Fri, 13 Feb 2026 18:28:38 GMT Content-Type: text/html Content-Length: 146 Connection: keep-alive ``` NOTE: I know is not the same, but with ingress-nginx app1 . mysite . com it works correctly. ```auto HTTP/1.1 404 Not Found Date: Fri, 13 Feb 2026 18:33:04 GMT Connection: keep-alive Vary: Origin Strict-Transport-Security: max-age=31536000; includeSubDomains my-test-header: test-value --> Correct ``` ---
**Author:** ![Micheal\_Kingston](https://drob5swvtjqxg.cloudfront.net/user_avatar/community.nginx.org/micheal_kingston/32/3810_2.png) [@Micheal\_Kingston](https://community.nginx.org/u/Micheal_Kingston)\ **Post date:** [February 13, 2026, 7:07pm UTC](https://community.nginx.org/t/snippets-add-header-doesnt-work-with-all-applications/9034/2 "2026-02-13T19:07:39Z")
Hi @VictorCisternas ! I think the issue here is inheritance. Could you try this? [Module ngx\_http\_headers\_module](https://nginx.org/en/docs/http/ngx_http_headers_module.html#add_header_inherit) ---
**Author:** ![VictorCisternas](https://drob5swvtjqxg.cloudfront.net/user_avatar/community.nginx.org/victorcisternas/32/4146_2.png) [@VictorCisternas](https://community.nginx.org/u/VictorCisternas)\ **Post date:** [February 13, 2026, 10:31pm UTC](https://community.nginx.org/t/snippets-add-header-doesnt-work-with-all-applications/9034/3 "2026-02-13T22:31:34Z")
@Micheal_Kingston Thank you, in the documentation you sent me, I understand that it may be because the application is responding with a 404 code and add\_header supports other codes. Anyway, perform the tests without changes: ```auto nginx.org/server-snippets: | add_header_inherit merge; add_header Access-Control-Allow-Origin *; or: nginx.org/server-snippets: | add_header_inherit on; add_header Access-Control-Allow-Origin *; or: nginx.org/server-snippets: | add_header_inherit off; add_header Access-Control-Allow-Origin *; or: nginx.org/server-snippets: | add_trailer_inherit merge; add_header Access-Control-Allow-Origin *; or: nginx.org/server-snippets: | add_trailer_inherit on; add_header Access-Control-Allow-Origin *; or: nginx.org/server-snippets: | add_trailer_inherit off; add_header Access-Control-Allow-Origin *; or: nginx.org/server-snippets: | add_header_inherit merge; add_trailer_inherit merge; add_header Access-Control-Allow-Origin *; or: nginx.org/server-snippets: | add_header_inherit on; add_trailer_inherit on; add_header Access-Control-Allow-Origin *; or: nginx.org/server-snippets: | add_header_inherit off; add_trailer_inherit off; add_header Access-Control-Allow-Origin *; ``` Now I understand the cause, I’ll try to run some more tests, thanks!! ---
**Author:** ![system](https://drob5swvtjqxg.cloudfront.net/user_avatar/community.nginx.org/system/32/19_2.png) [@system](https://community.nginx.org/u/system)\ **Post date:** [February 20, 2026, 10:32pm UTC](https://community.nginx.org/t/snippets-add-header-doesnt-work-with-all-applications/9034/4 "2026-02-20T22:32:15Z")
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