fix: fail loud when enable-csrf is set but csrf-key annotation is missing - #440
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📝 WalkthroughWalkthroughIngress webhook create and update validation now reject enabled CSRF without a non-empty key. The CSRF translator plugin applies the same error behavior, with tests covering missing, empty, valid, and disabled-CSRF configurations. ChangesIngress CSRF validation
Estimated code review effort: 2 (Simple) | ~10 minutes 🚥 Pre-merge checks | ✅ 5 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (5 passed)
✨ Finishing Touches📝 Generate docstrings
🧪 Generate unit tests (beta)
Comment |
conformance test report - apisix modeapiVersion: gateway.networking.k8s.io/v1
date: "2026-07-30T07:11:39Z"
gatewayAPIChannel: experimental
gatewayAPIVersion: v1.6.0
implementation:
contact:
- https://github.com/apache/apisix-ingress-controller/issues
organization: APISIX
project: apisix-ingress-controller
url: https://github.com/apache/apisix-ingress-controller.git
version: v2.0.0
kind: ConformanceReport
mode: default
profiles:
- core:
result: partial
skippedTests:
- HTTPRouteHTTPSListener
- HTTPRouteInvalidBackendRefUnknownKind
- HTTPRouteInvalidCrossNamespaceBackendRef
- HTTPRouteInvalidNonExistentBackendRef
- HTTPRouteListenerHostnameMatching
- HTTPRouteMultipleGateways
- HTTPRouteNoBackendRefs
statistics:
Failed: 0
Passed: 30
Skipped: 7
extended:
result: partial
skippedTests:
- HTTPRouteRedirectPortAndScheme
statistics:
Failed: 0
Passed: 12
Skipped: 1
supportedFeatures:
- GatewayAddressEmpty
- GatewayPort8080
- HTTPRouteBackendProtocolWebSocket
- HTTPRouteDestinationPortMatching
- HTTPRouteHostRewrite
- HTTPRouteMethodMatching
- HTTPRoutePathRewrite
- HTTPRoutePortRedirect
- HTTPRouteQueryParamMatching
- HTTPRouteRequestMirror
- HTTPRouteResponseHeaderModification
- HTTPRouteSchemeRedirect
unsupportedFeatures:
- BackendTLSPolicy
- BackendTLSPolicySANValidation
- GatewayBackendClientCertificate
- GatewayFrontendClientCertificateValidation
- GatewayFrontendClientCertificateValidationInsecureFallback
- GatewayHTTPListenerIsolation
- GatewayHTTPSListenerDetectMisdirectedRequests
- GatewayInfrastructurePropagation
- GatewayStaticAddresses
- HTTPRoute303RedirectStatusCode
- HTTPRoute307RedirectStatusCode
- HTTPRoute308RedirectStatusCode
- HTTPRouteBackendProtocolH2C
- HTTPRouteBackendRequestHeaderModification
- HTTPRouteBackendTimeout
- HTTPRouteCORS
- HTTPRouteNamedRouteRule
- HTTPRouteParentRefPort
- HTTPRoutePathRedirect
- HTTPRouteRequestMultipleMirrors
- HTTPRouteRequestPercentageMirror
- HTTPRouteRequestTimeout
- HTTPRouteRetry
- HTTPRouteRetryBackendTimeout
- HTTPRouteRetryConnectionError
- ListenerSet
name: GATEWAY-HTTP
summary: Core tests partially succeeded with 7 test skips. Extended tests partially
succeeded with 1 test skips.
- core:
result: partial
skippedTests:
- GRPCRouteListenerHostnameMatching
statistics:
Failed: 0
Passed: 14
Skipped: 1
extended:
result: success
statistics:
Failed: 0
Passed: 1
Skipped: 0
supportedFeatures:
- GatewayAddressEmpty
- GatewayPort8080
unsupportedFeatures:
- GatewayBackendClientCertificate
- GatewayFrontendClientCertificateValidation
- GatewayFrontendClientCertificateValidationInsecureFallback
- GatewayHTTPListenerIsolation
- GatewayHTTPSListenerDetectMisdirectedRequests
- GatewayInfrastructurePropagation
- GatewayStaticAddresses
- ListenerSet
name: GATEWAY-GRPC
summary: Core tests partially succeeded with 1 test skips. Extended tests succeeded.
- core:
result: partial
skippedTests:
- TLSRouteHostnameIntersection
- TLSRouteInvalidBackendRefNonexistent
- TLSRouteInvalidBackendRefUnknownKind
- TLSRouteSimpleSameNamespace
statistics:
Failed: 0
Passed: 16
Skipped: 4
extended:
result: partial
skippedTests:
- TLSRouteTerminateSimpleSameNamespace
statistics:
Failed: 0
Passed: 3
Skipped: 1
supportedFeatures:
- GatewayAddressEmpty
- GatewayPort8080
- TLSRouteModeTerminate
unsupportedFeatures:
- GatewayBackendClientCertificate
- GatewayFrontendClientCertificateValidation
- GatewayFrontendClientCertificateValidationInsecureFallback
- GatewayHTTPListenerIsolation
- GatewayHTTPSListenerDetectMisdirectedRequests
- GatewayInfrastructurePropagation
- GatewayStaticAddresses
- ListenerSet
- TLSRouteModeMixed
name: GATEWAY-TLS
summary: Core tests partially succeeded with 4 test skips. Extended tests partially
succeeded with 1 test skips.
succeededProvisionalTests:
- GatewayOptionalAddressValue |
conformance test report - apisix-standalone modeapiVersion: gateway.networking.k8s.io/v1
date: "2026-07-30T07:11:41Z"
gatewayAPIChannel: experimental
gatewayAPIVersion: v1.6.0
implementation:
contact:
- https://github.com/apache/apisix-ingress-controller/issues
organization: APISIX
project: apisix-ingress-controller
url: https://github.com/apache/apisix-ingress-controller.git
version: v2.0.0
kind: ConformanceReport
mode: default
profiles:
- core:
result: partial
skippedTests:
- HTTPRouteHTTPSListener
- HTTPRouteInvalidBackendRefUnknownKind
- HTTPRouteInvalidCrossNamespaceBackendRef
- HTTPRouteInvalidNonExistentBackendRef
- HTTPRouteListenerHostnameMatching
- HTTPRouteMultipleGateways
- HTTPRouteNoBackendRefs
statistics:
Failed: 0
Passed: 30
Skipped: 7
extended:
result: partial
skippedTests:
- HTTPRouteRedirectPortAndScheme
statistics:
Failed: 0
Passed: 12
Skipped: 1
supportedFeatures:
- GatewayAddressEmpty
- GatewayPort8080
- HTTPRouteBackendProtocolWebSocket
- HTTPRouteDestinationPortMatching
- HTTPRouteHostRewrite
- HTTPRouteMethodMatching
- HTTPRoutePathRewrite
- HTTPRoutePortRedirect
- HTTPRouteQueryParamMatching
- HTTPRouteRequestMirror
- HTTPRouteResponseHeaderModification
- HTTPRouteSchemeRedirect
unsupportedFeatures:
- BackendTLSPolicy
- BackendTLSPolicySANValidation
- GatewayBackendClientCertificate
- GatewayFrontendClientCertificateValidation
- GatewayFrontendClientCertificateValidationInsecureFallback
- GatewayHTTPListenerIsolation
- GatewayHTTPSListenerDetectMisdirectedRequests
- GatewayInfrastructurePropagation
- GatewayStaticAddresses
- HTTPRoute303RedirectStatusCode
- HTTPRoute307RedirectStatusCode
- HTTPRoute308RedirectStatusCode
- HTTPRouteBackendProtocolH2C
- HTTPRouteBackendRequestHeaderModification
- HTTPRouteBackendTimeout
- HTTPRouteCORS
- HTTPRouteNamedRouteRule
- HTTPRouteParentRefPort
- HTTPRoutePathRedirect
- HTTPRouteRequestMultipleMirrors
- HTTPRouteRequestPercentageMirror
- HTTPRouteRequestTimeout
- HTTPRouteRetry
- HTTPRouteRetryBackendTimeout
- HTTPRouteRetryConnectionError
- ListenerSet
name: GATEWAY-HTTP
summary: Core tests partially succeeded with 7 test skips. Extended tests partially
succeeded with 1 test skips.
- core:
result: partial
skippedTests:
- GRPCRouteListenerHostnameMatching
statistics:
Failed: 0
Passed: 14
Skipped: 1
extended:
result: success
statistics:
Failed: 0
Passed: 1
Skipped: 0
supportedFeatures:
- GatewayAddressEmpty
- GatewayPort8080
unsupportedFeatures:
- GatewayBackendClientCertificate
- GatewayFrontendClientCertificateValidation
- GatewayFrontendClientCertificateValidationInsecureFallback
- GatewayHTTPListenerIsolation
- GatewayHTTPSListenerDetectMisdirectedRequests
- GatewayInfrastructurePropagation
- GatewayStaticAddresses
- ListenerSet
name: GATEWAY-GRPC
summary: Core tests partially succeeded with 1 test skips. Extended tests succeeded.
- core:
result: partial
skippedTests:
- TLSRouteHostnameIntersection
- TLSRouteInvalidBackendRefNonexistent
- TLSRouteInvalidBackendRefUnknownKind
- TLSRouteSimpleSameNamespace
statistics:
Failed: 0
Passed: 16
Skipped: 4
extended:
result: partial
skippedTests:
- TLSRouteTerminateSimpleSameNamespace
statistics:
Failed: 0
Passed: 3
Skipped: 1
supportedFeatures:
- GatewayAddressEmpty
- GatewayPort8080
- TLSRouteModeTerminate
unsupportedFeatures:
- GatewayBackendClientCertificate
- GatewayFrontendClientCertificateValidation
- GatewayFrontendClientCertificateValidationInsecureFallback
- GatewayHTTPListenerIsolation
- GatewayHTTPSListenerDetectMisdirectedRequests
- GatewayInfrastructurePropagation
- GatewayStaticAddresses
- ListenerSet
- TLSRouteModeMixed
name: GATEWAY-TLS
summary: Core tests partially succeeded with 4 test skips. Extended tests partially
succeeded with 1 test skips.
succeededProvisionalTests:
- GatewayOptionalAddressValue |
conformance test reportapiVersion: gateway.networking.k8s.io/v1
date: "2026-07-30T07:31:35Z"
gatewayAPIChannel: experimental
gatewayAPIVersion: v1.6.0
implementation:
contact:
- https://github.com/apache/apisix-ingress-controller/issues
organization: APISIX
project: apisix-ingress-controller
url: https://github.com/apache/apisix-ingress-controller.git
version: v2.0.0
kind: ConformanceReport
mode: default
profiles:
- core:
failedTests:
- GatewayModifyListeners
- HTTPRouteInvalidBackendRefUnknownKind
- HTTPRouteMultipleGateways
- HTTPRouteNoBackendRefs
result: failure
skippedTests:
- HTTPRouteHTTPSListener
statistics:
Failed: 4
Passed: 32
Skipped: 1
extended:
result: partial
skippedTests:
- HTTPRouteRedirectPortAndScheme
statistics:
Failed: 0
Passed: 12
Skipped: 1
supportedFeatures:
- GatewayAddressEmpty
- GatewayPort8080
- HTTPRouteBackendProtocolWebSocket
- HTTPRouteDestinationPortMatching
- HTTPRouteHostRewrite
- HTTPRouteMethodMatching
- HTTPRoutePathRewrite
- HTTPRoutePortRedirect
- HTTPRouteQueryParamMatching
- HTTPRouteRequestMirror
- HTTPRouteResponseHeaderModification
- HTTPRouteSchemeRedirect
unsupportedFeatures:
- BackendTLSPolicy
- BackendTLSPolicySANValidation
- GatewayBackendClientCertificate
- GatewayFrontendClientCertificateValidation
- GatewayFrontendClientCertificateValidationInsecureFallback
- GatewayHTTPListenerIsolation
- GatewayHTTPSListenerDetectMisdirectedRequests
- GatewayInfrastructurePropagation
- GatewayStaticAddresses
- HTTPRoute303RedirectStatusCode
- HTTPRoute307RedirectStatusCode
- HTTPRoute308RedirectStatusCode
- HTTPRouteBackendProtocolH2C
- HTTPRouteBackendRequestHeaderModification
- HTTPRouteBackendTimeout
- HTTPRouteCORS
- HTTPRouteNamedRouteRule
- HTTPRouteParentRefPort
- HTTPRoutePathRedirect
- HTTPRouteRequestMultipleMirrors
- HTTPRouteRequestPercentageMirror
- HTTPRouteRequestTimeout
- HTTPRouteRetry
- HTTPRouteRetryBackendTimeout
- HTTPRouteRetryConnectionError
- ListenerSet
name: GATEWAY-HTTP
summary: Core tests failed with 4 test failures. Extended tests partially succeeded
with 1 test skips.
- core:
failedTests:
- GatewayModifyListeners
result: failure
statistics:
Failed: 1
Passed: 14
Skipped: 0
extended:
result: success
statistics:
Failed: 0
Passed: 1
Skipped: 0
supportedFeatures:
- GatewayAddressEmpty
- GatewayPort8080
unsupportedFeatures:
- GatewayBackendClientCertificate
- GatewayFrontendClientCertificateValidation
- GatewayFrontendClientCertificateValidationInsecureFallback
- GatewayHTTPListenerIsolation
- GatewayHTTPSListenerDetectMisdirectedRequests
- GatewayInfrastructurePropagation
- GatewayStaticAddresses
- ListenerSet
name: GATEWAY-GRPC
summary: Core tests failed with 1 test failures. Extended tests succeeded.
- core:
failedTests:
- GatewayModifyListeners
- TLSRouteHostnameIntersection
- TLSRouteInvalidBackendRefNonexistent
- TLSRouteInvalidBackendRefUnknownKind
- TLSRouteSimpleSameNamespace
result: failure
statistics:
Failed: 5
Passed: 15
Skipped: 0
extended:
failedTests:
- TLSRouteTerminateSimpleSameNamespace
result: failure
statistics:
Failed: 1
Passed: 3
Skipped: 0
supportedFeatures:
- GatewayAddressEmpty
- GatewayPort8080
- TLSRouteModeTerminate
unsupportedFeatures:
- GatewayBackendClientCertificate
- GatewayFrontendClientCertificateValidation
- GatewayFrontendClientCertificateValidationInsecureFallback
- GatewayHTTPListenerIsolation
- GatewayHTTPSListenerDetectMisdirectedRequests
- GatewayInfrastructurePropagation
- GatewayStaticAddresses
- ListenerSet
- TLSRouteModeMixed
name: GATEWAY-TLS
summary: Core tests failed with 5 test failures. Extended tests failed with 1 test
failures.
succeededProvisionalTests:
- GatewayOptionalAddressValue |
…hook FINDING-031: when enable-csrf is set but csrf-key is missing or empty, the csrf plugin was silently dropped and the route programmed without CSRF protection while the Ingress reconciled cleanly. Enforce this in the Ingress validating webhook (create and update) so the invalid combination is rejected at kubectl apply, loudly and synchronously, for both new and updated Ingresses. This replaces the earlier translation-failure approach, which: - did not cover the update path (an already-served unprotected route survived, since Provider.Update returns before UpdateConfig); - over-reached: any annotation error, e.g. a typo'd upstream-scheme, failed the whole Ingress including its TLS; - could not truly fail closed anyway, since dropping a route lets traffic fall through to any broader wildcard route. The webhook is deployed with failurePolicy: Ignore, so this is a best-effort gate; hardening that bypass is tracked separately.
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The webhook is the enforcement point, but it cannot cover every case: webhook disabled, or an Ingress created before the upgrade that never gets re-admitted. Return an error from csrf.Handle so plugins.Parse emits a log line for those cases instead of dropping the plugin in total silence. Parse skips only the csrf plugin, so the rest of the route is unaffected.
validateAnnotations is a pure in-memory check, so run it before DetectConflicts, which does List calls and Secret reads. Reject an invalid annotation combination without the network round-trips.
What this PR does
Fixes FINDING-031. When
enable-csrf: "true"is set on an Ingress butcsrf-keyis missing or empty, the csrf plugin was silently dropped: the route was programmed without CSRF protection and the Ingress reconciled cleanly, so an endpoint the operator believed was protected ran unprotected with no error surfaced.Approach (changed after review)
Enforce the rule in the Ingress validating admission webhook (
ingress_webhook.go), for bothValidateCreateandValidateUpdate.enable-csrf: truewith an empty/missingcsrf-keyis now a hard error, sokubectl applyis rejected loudly and synchronously, before the object is ever stored, for both new and updated Ingresses.This replaces the earlier translation-failure approach, per review feedback from @AlinsRan and @nic-6443. That approach was reverted because:
enable-csrfwith no key,Provider.Updatereturned on the translation error beforeUpdateConfig, so the old unprotected route stayed live in the data plane (raised by @nic-6443).{Service, SSL}together, so failing the whole translation on any annotation error meant a typo in a non-security annotation (e.g.upstream-scheme) took down the Ingress including its TLS (raised by @AlinsRan).The webhook can enforce severity properly (hard error vs warning) and blocks the bad intent at the source, which the translation layer structurally cannot.
Known limitation
The Ingress webhook is deployed with
failurePolicy: Ignore, so if the webhook is unavailable the invalid Ingress is admitted. This is a best-effort gate, not an unbreakable boundary; hardening that bypass is a separate concern (same class as the webhook-availability finding).Test
Added to
ingress_webhook_test.go:enable-csrfwithout a key, and with an empty key, are rejected on create.enable-csrfwith a key, and csrf-not-enabled, are allowed.Synced with apache/apisix-ingress-controller#2813.
Summary by CodeRabbit