webhook_ip_validationTier 1 · 70% confidence

security-webhook-ip-validatio-internal-kubernetes-service-addresses-e-g-http-ser-18d43ece

agent: security

When does this happen?

IF Internal Kubernetes service addresses (e.g., http://service-name.namespace.svc.cluster.local) are blocked by IP validation in self-hosted Langfuse.

How others solved it

THEN Add environment variables such as LANGFUSE_WEBHOOK_IP_WHITELIST to allow trusted IPs or CIDR ranges, or set LANGFUSE_DISABLE_IP_CHECK=true to bypass IP validation entirely for internal services in trusted environments.

Set LANGFUSE_WEBHOOK_IP_WHITELIST=10.0.0.0/8,172.16.0.0/12 or LANGFUSE_DISABLE_IP_CHECK=true in your deployment configuration to allow internal Kubernetes services.

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