CVE-2026-54658 in Hypequery
Summary
by MITRE • 07/29/2026
Hypequery is a TypeScript semantic layer for ClickHouse. Prior to 2.0.2, escapeValue() in packages/clickhouse/src/core/utils.ts did not escape backslashes before single quotes during parameter substitution, allowing attacker controlled query parameters with a trailing backslash to escape the closing quote and inject arbitrary SQL. This issue is fixed in version 2.0.2.
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Analysis
by VulDB Data Team • 07/29/2026
The Hypequery library serves as a TypeScript semantic layer that facilitates interaction with ClickHouse databases through a type-safe interface. This tool bridges the gap between TypeScript applications and ClickHouse's SQL execution engine, providing developers with compile-time type checking while maintaining the flexibility of dynamic query building. The vulnerability resides within the core utility functions responsible for parameter sanitization and SQL query construction, specifically in the escapeValue() method implemented in packages/clickhouse/src/core/utils.ts.
The technical flaw manifests as a classic SQL injection vulnerability stemming from inadequate input sanitization during parameter substitution processes. When processing user-controlled parameters through the escapeValue() function, the implementation fails to properly escape backslashes that precede single quotes in the input data. This omission creates a pathway for malicious actors to manipulate query execution by crafting inputs containing trailing backslashes followed by single quotes. The vulnerability specifically affects scenarios where parameter values are directly substituted into SQL queries without proper escaping mechanisms.
The operational impact of this vulnerability extends beyond simple data integrity concerns, potentially enabling attackers to execute arbitrary SQL commands against the underlying ClickHouse database. An attacker could exploit this weakness by providing carefully crafted input parameters that, when processed through the vulnerable escapeValue() function, would cause the closing quote delimiter to be effectively escaped. This allows the injection of additional SQL syntax elements that could modify query behavior, access unauthorized data, or even perform destructive operations on the database system.
This vulnerability aligns with CWE-89 which categorizes SQL injection flaws as weaknesses in software that permits malicious SQL code execution through improper input validation and sanitization. The specific nature of this flaw also corresponds to ATT&CK technique T1071.004, which covers application layer protocol manipulation involving database protocols. The issue demonstrates a fundamental failure in implementing proper parameter binding mechanisms, where developers rely on manual escaping rather than utilizing secure prepared statement interfaces that inherently prevent such injection scenarios.
The mitigation strategy involves upgrading to version 2.0.2 or later, which implements correct backslash escaping before single quotes during parameter substitution. Organizations should also implement comprehensive input validation processes and consider adopting more robust database interaction patterns that utilize prepared statements or parameterized queries with proper binding mechanisms. Additionally, regular security audits of third-party libraries and dependency updates should form part of the overall security posture to prevent similar vulnerabilities from persisting in production environments.
Security teams should monitor for potential exploitation attempts through database access logs and implement automated scanning tools to detect malformed input patterns that might indicate SQL injection attempts. The incident underscores the critical importance of proper input sanitization in database interaction layers and highlights how seemingly minor implementation oversights can create significant security risks in data processing applications. Organizations using Hypequery or similar libraries should conduct thorough vulnerability assessments and ensure all dependencies are maintained at secure versions to prevent unauthorized access to their ClickHouse databases.