CVE-2026-18801 CRITICAL

CVE-2026-18801: Stored Clickhouse SQL Injection Through Customer Usage Attribution

Vendor Openmeter
Product openmeter
Weakness CWE-20 · Input validation
Published August 4, 2026
Last update August 4, 2026

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:H/SC:H/SI:L/SA:H

What the vulnerability does

01Description

OpenMeter contains a stored, or second-order, SQL injection vulnerability in the handling of customer usage-attribution values. An attacker who can create or update a customer can store a malicious value in the usageAttribution.key or usageAttribution.subjectKeys fields. When that customer is subsequently used in a meter or event query, OpenMeter inserts the stored value into a ClickHouse WITH map(...) expression using string concatenation. OpenMeter versions from v1.0.0-beta.218 through v1.0.0-beta.231 are affected.

Key dates

02Disclosure timeline

August 4, 2026 CVE published

Related vulnerabilities

04Related CVE