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CVE-2026-42316— KQL injection via kusto.tables.topics.mapping in kafka-sink-azure-kusto

CVSS 5.9 · Medium EPSS 0.02% · P7

Affected Version Matrix 1

VendorProductVersion RangeStatus
Azurekafka-sink-azure-kusto< 5.2.3affected
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I. Basic Information for CVE-2026-42316

Vulnerability Information
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Vulnerability Title
KQL injection via kusto.tables.topics.mapping in kafka-sink-azure-kusto
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
数据查询逻辑中特殊元素的不当中和
Source: NVD (National Vulnerability Database)
Vulnerability Title
Microsoft Azure Data Explorer Kafka Connect Kusto Sink Connector 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Azure Data Explorer Kafka Connect Kusto Sink Connector是Microsoft开源的一个Kafka数据到Azure大数据分析数据库的同步连接器。 Microsoft Azure Data Explorer Kafka Connect Kusto Sink Connector 5.2.3之前版本存在安全漏洞，该漏洞源于kusto.tables.topics.mapping配置中用户控制的值未经清理，可能导致能够影响连接器配置的攻击者嵌入K
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
Azurekafka-sink-azure-kusto < 5.2.3 -

II. Public POCs for CVE-2026-42316

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III. Intelligence Information for CVE-2026-42316

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IV. Related Vulnerabilities

Same vendor: Azure
Same weakness: CWE-943

V. Comments for CVE-2026-42316

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