Ldap Sidecar Injection is an attack where malicious code exploits insecure configuration or input handling in an LDAP sidecar container or helper process. By injecting crafted queries into the sidecar, an attacker can pivot into the main application, escalate privileges, or extract sensitive directory data. This is not LDAP injection in the core app alone—here the danger moves laterally through the infrastructure you thought was safe.
A sidecar pattern is common in microservices and Kubernetes deployments. It runs alongside your primary application, often sharing volumes, network, or environment variables. When that sidecar handles directory lookups, authentication, or user sync tasks, it becomes a target. If request validation is weak, LDAP queries pass straight from the attacker’s input into the directory, bypassing core API defenses.
Attackers exploit these gaps by sending payloads designed to alter search filters, cause privilege changes, or dump attributes. In real incidents, abused sidecars have granted direct access to user accounts, group memberships, and even admin roles. The risk grows when sidecars share credentials through environment variables or mounted secrets.