CVE-2026-42316
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk28th percentile - higher than 28% of all known CVEs
Summary
Prior to 5.2.3, kafka-sink-azure-kusto did not sanitize user-controlled values in the kusto.tables.topics.mapping configuration. The db, table, mapping, and format fields of each mapping entry were interpolated directly into KQL management/query commands via String.formatted(...), allowing an actor able to influence the connector configuration to embed KQL metacharacters (;, |, ') and execute arbitrary management commands in the context of the connector's service principal.
Risk Assessment
Someone with permissions to edit connector configuration can modify schemas, ingestion mappings, or retention policies on the target Azure Data Explorer database. This poses a tampering risk to data and configuration integrity.
Recommendation
Upgrade kafka-sink-azure-kusto to version 5.2.3. Restrict permissions to edit Kafka Connect connector configurations to the minimum necessary.
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Original NVD description (English source)
kafka-sink-azure-kusto Kafka Connect plugin is the official Microsoft sink for Azure Data Explorer (Kusto). Prior to 5.2.3, kafka-sink-azure-kusto did not sanitize user-controlled values inside the kusto.tables.topics.mapping configuration. The db, table, mapping, and format fields of each mapping entry were interpolated directly into KQL management/query commands via String.formatted(...) (e.g., FETCH_TABLE_COMMAND.formatted(table) → "<table> | count", FETCH_TABLE_MAPPING_COMMAND.formatted(table, format, mapping) → ".show table <table> ingestion <format> mapping '<mapping>'"). An actor able to influence the connector configuration (for example, someone with permissions to submit or edit Kafka Connect connector configs) could embed KQL metacharacters (;, |, ') to execute arbitrary management commands in the context of the connector's service principal — enabling schema enumeration/modification, ingestion-mapping tampering, or changes to streaming/retention policies on the target Azure Data Explorer database. This is a tampering vulnerability. Exploitation requires privileged access to the connector configuration; no end-user interaction or Kafka record payload is involved. This vulnerability is fixed in 5.2.3.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

