CVE-2026-18801

Stored Clickhouse SQL Injection Through Customer Usage Attribution

State: Published
Severity: 9.3 Critical
Published: Aug 4, 2026
Updated: Aug 4, 2026
Reserved: Aug 4, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	9.3 Critical	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	Kong

Weaknesses

CWE-20 Improper input validation

Affected Products

Product	Versions
openmeteropenmeter	v1.0.0-beta.218 through v1.0.0-beta.231Affected

References

https://github.com/openmeterio/openmeter/security/advisories/GHSA-m2fw-9wxq-jgf5

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