Stored Clickhouse SQL Injection Through Customer Usage Attribution (CVE-2026-18801) | HOL Guard CVE

Critical · CVSS 9.3CVE-2026-18801

Stored Clickhouse SQL Injection Through Customer Usage Attribution

Answer in brief

CVE-2026-18801 records a Critical severity (CVSS 9.3) vulnerability in Stored Clickhouse SQL Injection Through Customer Usage Attribution. The current sources do not mark it as known exploited. The current feed maps openmeter/openmeter (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 4, 2026Updated Aug 31, 2026Source checked Sep 19, 2026First seen by HOL Aug 4, 2026Material review Aug 31, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 9.3
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 9.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps openmeter/openmeter (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
openmeter/openmetergeneric	v1.0.0-beta.218	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for openmeter/openmeter.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 31, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 4, 2026

Sources and claim methodology

GitHub security advisorygithub.com

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.