CVE-2026-54658
Deferred Deferred - Pending Action

SQL Injection in Hypequery TypeScript Semantic Layer

Publication date: 2026-07-28

Last updated on: 2026-08-04

Assigner: GitHub, Inc.

Description
Hypequery is a TypeScript semantic layer for ClickHouse. Prior to 2.5.1, 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. Version 2.0.2 fixes string parameters, while version 2.5.1 fixes all known vectors. Upgrading to 2.5.1 or later is the only complete fix. In versions 2.0.2 through 2.5.0, serializing non-scalar parameters with  JSON.stringify()  before passing them is a workaround for the object/array vector only.

CVSS Scores

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Meta Information

Published
2026-07-28
Last Modified
2026-08-04
Generated
2026-08-18
AI Q&A
2026-07-29
EPSS Evaluated
2026-08-16
NVD
CVE-2026-54658

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
hypequery hypequery to 2.0.2 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-89 The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.

Attack-Flow Graph

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Executive Summary

Hypequery is a TypeScript tool for ClickHouse databases. A flaw in its escapeValue() function in versions before 2.0.2 fails to properly escape backslashes before single quotes during query parameter substitution. This allows attackers to inject arbitrary SQL by using a trailing backslash to escape the closing quote in a query.

Detection Guidance

To detect this vulnerability, check if your Hypequery version is prior to 2.0.2. Run: npm list hypequery or grep version in package.json. If vulnerable, update to 2.0.2 or later immediately.

Impact Analysis

This vulnerability could allow attackers to execute malicious SQL commands on your ClickHouse database. This may result in unauthorized data access, modification, deletion, or even full database compromise. The high CVSS score indicates a critical risk level.

Compliance Impact

This vulnerability could lead to unauthorized data access or breaches, which may violate GDPR's data protection requirements or HIPAA's security rules for protected health information. Compliance failures could result in legal penalties, fines, or reputational damage.

Mitigation Strategies

Update Hypequery to version 2.0.2 or later to fix the SQL injection vulnerability in escapeValue().

Review and audit any custom SQL queries using Hypequery to ensure no malicious parameters are being passed.

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