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How the mentioned CVE works:
This CVE exploits a SQL injection vulnerability within the Change Data Capture (CDC) functionality of Apache Flink. The flaw exists in the code responsible for handling database and table identifiers when configuring CDC sources. User-supplied input for identifiers, such as database or table names, is not properly sanitized before being incorporated into SQL queries. An attacker can craft a malicious database or table name containing special SQL meta-characters and commands. When Flink CDC processes this crafted identifier, the malicious payload is injected into the SQL statement executed against the source database. This allows the attacker to execute arbitrary SQL commands on the underlying database, with the privileges of the Flink application’s database user, potentially leading to data leakage, modification, or deletion.
Platform: Apache Flink CDC
Version: 3.0.0 – 3.4.x
Vulnerability : SQL Injection
Severity: Moderate
date: 2025-10-09
Prediction: Patch available
What Undercode Say:
`SELECT FROM ‘malicious_db’.’injected_sql–‘;`
`jdbc:mysql://host/db?user=flink_user&password=xxx`
`conn.prepareStatement(unsanitizedIdentifier);`
How Exploit:
Craft malicious table name.
Configure Flink CDC source.
Trigger pipeline execution.
Protection from this CVE
Upgrade to version 3.5.0.
Implement input sanitization.
Use principle of least privilege.
Impact:
Arbitrary SQL execution.
Data confidentiality loss.
Data integrity compromise.
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Sources:
Reported By: github.com
Extra Source Hub:
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